CWE-476
AllowedNULL Pointer Dereference
Abstraction: Base · Status: Stable
The product dereferences a pointer that it expects to be valid but is NULL.
6310 vulnerabilities reference this CWE, most recent first.
GHSA-Q4JM-639H-26P9
Vulnerability from github – Published: 2022-05-24 16:56 – Updated: 2023-08-17 15:30ffjpeg before 2019-08-18 has a NULL pointer dereference in idct2d8x8() at dct.c.
{
"affected": [],
"aliases": [
"CVE-2019-16350"
],
"database_specific": {
"cwe_ids": [
"CWE-476"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2019-09-16T13:15:00Z",
"severity": "MODERATE"
},
"details": "ffjpeg before 2019-08-18 has a NULL pointer dereference in idct2d8x8() at dct.c.",
"id": "GHSA-q4jm-639h-26p9",
"modified": "2023-08-17T15:30:17Z",
"published": "2022-05-24T16:56:18Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2019-16350"
},
{
"type": "WEB",
"url": "https://github.com/rockcarry/ffjpeg/issues/10"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-Q4JX-XCC8-66QX
Vulnerability from github – Published: 2025-05-29 21:31 – Updated: 2025-05-29 21:31MikroTik RouterOS 6.40.5, the SMB service contains a memory corruption vulnerability. Remote, unauthenticated attackers can exploit this issue by sending specially crafted packets, triggering a null pointer dereference. This leads to a Remote Denial of Service (DoS), rendering the SMB service unavailable.
{
"affected": [],
"aliases": [
"CVE-2024-54952"
],
"database_specific": {
"cwe_ids": [
"CWE-476"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-05-29T20:15:26Z",
"severity": "HIGH"
},
"details": "MikroTik RouterOS 6.40.5, the SMB service contains a memory corruption vulnerability. Remote, unauthenticated attackers can exploit this issue by sending specially crafted packets, triggering a null pointer dereference. This leads to a Remote Denial of Service (DoS), rendering the SMB service unavailable.",
"id": "GHSA-q4jx-xcc8-66qx",
"modified": "2025-05-29T21:31:37Z",
"published": "2025-05-29T21:31:37Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-54952"
},
{
"type": "WEB",
"url": "https://github.com/noobone123/RouterOS-issues/blob/main/README.md"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-Q4M9-3FR6-F83P
Vulnerability from github – Published: 2026-01-26 06:30 – Updated: 2026-02-23 09:31A security flaw has been discovered in GPAC up to 2.4.0. Affected by this vulnerability is the function DumpMovieInfo of the file applications/mp4box/filedump.c. The manipulation results in null pointer dereference. The attack must be initiated from a local position. The exploit has been released to the public and may be used for attacks. The patch is identified as d45c264c20addf0c1cc05124ede33f8ffa800e68. It is advisable to implement a patch to correct this issue.
{
"affected": [],
"aliases": [
"CVE-2026-1416"
],
"database_specific": {
"cwe_ids": [
"CWE-404",
"CWE-476"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-01-26T04:16:09Z",
"severity": "MODERATE"
},
"details": "A security flaw has been discovered in GPAC up to 2.4.0. Affected by this vulnerability is the function DumpMovieInfo of the file applications/mp4box/filedump.c. The manipulation results in null pointer dereference. The attack must be initiated from a local position. The exploit has been released to the public and may be used for attacks. The patch is identified as d45c264c20addf0c1cc05124ede33f8ffa800e68. It is advisable to implement a patch to correct this issue.",
"id": "GHSA-q4m9-3fr6-f83p",
"modified": "2026-02-23T09:31:22Z",
"published": "2026-01-26T06:30:28Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-1416"
},
{
"type": "WEB",
"url": "https://github.com/gpac/gpac/issues/3427"
},
{
"type": "WEB",
"url": "https://github.com/gpac/gpac/issues/3427#issue-3802197432"
},
{
"type": "WEB",
"url": "https://github.com/enocknt/gpac/commit/d45c264c20addf0c1cc05124ede33f8ffa800e68"
},
{
"type": "WEB",
"url": "https://github.com/gpac/gpac"
},
{
"type": "WEB",
"url": "https://vuldb.com/?ctiid.342805"
},
{
"type": "WEB",
"url": "https://vuldb.com/?id.342805"
},
{
"type": "WEB",
"url": "https://vuldb.com/?submit.736542"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L",
"type": "CVSS_V3"
},
{
"score": "CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
"type": "CVSS_V4"
}
]
}
GHSA-Q4P2-VXPC-3R2V
Vulnerability from github – Published: 2024-08-17 09:30 – Updated: 2025-11-04 00:31In the Linux kernel, the following vulnerability has been resolved:
netfilter: iptables: Fix null-ptr-deref in iptable_nat_table_init().
We had a report that iptables-restore sometimes triggered null-ptr-deref at boot time. [0]
The problem is that iptable_nat_table_init() is exposed to user space before the kernel fully initialises netns.
In the small race window, a user could call iptable_nat_table_init() that accesses net_generic(net, iptable_nat_net_id), which is available only after registering iptable_nat_net_ops.
Let's call register_pernet_subsys() before xt_register_template().
[0]: bpfilter: Loaded bpfilter_umh pid 11702 Started bpfilter BUG: kernel NULL pointer dereference, address: 0000000000000013 PF: supervisor write access in kernel mode PF: error_code(0x0002) - not-present page PGD 0 P4D 0 PREEMPT SMP NOPTI CPU: 2 PID: 11879 Comm: iptables-restor Not tainted 6.1.92-99.174.amzn2023.x86_64 #1 Hardware name: Amazon EC2 c6i.4xlarge/, BIOS 1.0 10/16/2017 RIP: 0010:iptable_nat_table_init (net/ipv4/netfilter/iptable_nat.c:87 net/ipv4/netfilter/iptable_nat.c:121) iptable_nat Code: 10 4c 89 f6 48 89 ef e8 0b 19 bb ff 41 89 c4 85 c0 75 38 41 83 c7 01 49 83 c6 28 41 83 ff 04 75 dc 48 8b 44 24 08 48 8b 0c 24 <48> 89 08 4c 89 ef e8 a2 3b a2 cf 48 83 c4 10 44 89 e0 5b 5d 41 5c RSP: 0018:ffffbef902843cd0 EFLAGS: 00010246 RAX: 0000000000000013 RBX: ffff9f4b052caa20 RCX: ffff9f4b20988d80 RDX: 0000000000000000 RSI: 0000000000000064 RDI: ffffffffc04201c0 RBP: ffff9f4b29394000 R08: ffff9f4b07f77258 R09: ffff9f4b07f77240 R10: 0000000000000000 R11: ffff9f4b09635388 R12: 0000000000000000 R13: ffff9f4b1a3c6c00 R14: ffff9f4b20988e20 R15: 0000000000000004 FS: 00007f6284340000(0000) GS:ffff9f51fe280000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000013 CR3: 00000001d10a6005 CR4: 00000000007706e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 PKRU: 55555554 Call Trace: ? show_trace_log_lvl (arch/x86/kernel/dumpstack.c:259) ? show_trace_log_lvl (arch/x86/kernel/dumpstack.c:259) ? xt_find_table_lock (net/netfilter/x_tables.c:1259) ? __die_body.cold (arch/x86/kernel/dumpstack.c:478 arch/x86/kernel/dumpstack.c:420) ? page_fault_oops (arch/x86/mm/fault.c:727) ? exc_page_fault (./arch/x86/include/asm/irqflags.h:40 ./arch/x86/include/asm/irqflags.h:75 arch/x86/mm/fault.c:1470 arch/x86/mm/fault.c:1518) ? asm_exc_page_fault (./arch/x86/include/asm/idtentry.h:570) ? iptable_nat_table_init (net/ipv4/netfilter/iptable_nat.c:87 net/ipv4/netfilter/iptable_nat.c:121) iptable_nat xt_find_table_lock (net/netfilter/x_tables.c:1259) xt_request_find_table_lock (net/netfilter/x_tables.c:1287) get_info (net/ipv4/netfilter/ip_tables.c:965) ? security_capable (security/security.c:809 (discriminator 13)) ? ns_capable (kernel/capability.c:376 kernel/capability.c:397) ? do_ipt_get_ctl (net/ipv4/netfilter/ip_tables.c:1656) ? bpfilter_send_req (net/bpfilter/bpfilter_kern.c:52) bpfilter nf_getsockopt (net/netfilter/nf_sockopt.c:116) ip_getsockopt (net/ipv4/ip_sockglue.c:1827) __sys_getsockopt (net/socket.c:2327) __x64_sys_getsockopt (net/socket.c:2342 net/socket.c:2339 net/socket.c:2339) do_syscall_64 (arch/x86/entry/common.c:51 arch/x86/entry/common.c:81) entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121) RIP: 0033:0x7f62844685ee Code: 48 8b 0d 45 28 0f 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 90 f3 0f 1e fa 49 89 ca b8 37 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 0a c3 66 0f 1f 84 00 00 00 00 00 48 8b 15 09 RSP: 002b:00007ffd1f83d638 EFLAGS: 00000246 ORIG_RAX: 0000000000000037 RAX: ffffffffffffffda RBX: 00007ffd1f83d680 RCX: 00007f62844685ee RDX: 0000000000000040 RSI: 0000000000000000 RDI: 0000000000000004 RBP: 0000000000000004 R08: 00007ffd1f83d670 R09: 0000558798ffa2a0 R10: 00007ffd1f83d680 R11: 0000000000000246 R12: 00007ffd1f83e3b2 R13: 00007f6284 ---truncated---
{
"affected": [],
"aliases": [
"CVE-2024-42270"
],
"database_specific": {
"cwe_ids": [
"CWE-476"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-08-17T09:15:08Z",
"severity": "MODERATE"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: iptables: Fix null-ptr-deref in iptable_nat_table_init().\n\nWe had a report that iptables-restore sometimes triggered null-ptr-deref\nat boot time. [0]\n\nThe problem is that iptable_nat_table_init() is exposed to user space\nbefore the kernel fully initialises netns.\n\nIn the small race window, a user could call iptable_nat_table_init()\nthat accesses net_generic(net, iptable_nat_net_id), which is available\nonly after registering iptable_nat_net_ops.\n\nLet\u0027s call register_pernet_subsys() before xt_register_template().\n\n[0]:\nbpfilter: Loaded bpfilter_umh pid 11702\nStarted bpfilter\nBUG: kernel NULL pointer dereference, address: 0000000000000013\n PF: supervisor write access in kernel mode\n PF: error_code(0x0002) - not-present page\nPGD 0 P4D 0\nPREEMPT SMP NOPTI\nCPU: 2 PID: 11879 Comm: iptables-restor Not tainted 6.1.92-99.174.amzn2023.x86_64 #1\nHardware name: Amazon EC2 c6i.4xlarge/, BIOS 1.0 10/16/2017\nRIP: 0010:iptable_nat_table_init (net/ipv4/netfilter/iptable_nat.c:87 net/ipv4/netfilter/iptable_nat.c:121) iptable_nat\nCode: 10 4c 89 f6 48 89 ef e8 0b 19 bb ff 41 89 c4 85 c0 75 38 41 83 c7 01 49 83 c6 28 41 83 ff 04 75 dc 48 8b 44 24 08 48 8b 0c 24 \u003c48\u003e 89 08 4c 89 ef e8 a2 3b a2 cf 48 83 c4 10 44 89 e0 5b 5d 41 5c\nRSP: 0018:ffffbef902843cd0 EFLAGS: 00010246\nRAX: 0000000000000013 RBX: ffff9f4b052caa20 RCX: ffff9f4b20988d80\nRDX: 0000000000000000 RSI: 0000000000000064 RDI: ffffffffc04201c0\nRBP: ffff9f4b29394000 R08: ffff9f4b07f77258 R09: ffff9f4b07f77240\nR10: 0000000000000000 R11: ffff9f4b09635388 R12: 0000000000000000\nR13: ffff9f4b1a3c6c00 R14: ffff9f4b20988e20 R15: 0000000000000004\nFS: 00007f6284340000(0000) GS:ffff9f51fe280000(0000) knlGS:0000000000000000\nCS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 0000000000000013 CR3: 00000001d10a6005 CR4: 00000000007706e0\nDR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\nDR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\nPKRU: 55555554\nCall Trace:\n \u003cTASK\u003e\n ? show_trace_log_lvl (arch/x86/kernel/dumpstack.c:259)\n ? show_trace_log_lvl (arch/x86/kernel/dumpstack.c:259)\n ? xt_find_table_lock (net/netfilter/x_tables.c:1259)\n ? __die_body.cold (arch/x86/kernel/dumpstack.c:478 arch/x86/kernel/dumpstack.c:420)\n ? page_fault_oops (arch/x86/mm/fault.c:727)\n ? exc_page_fault (./arch/x86/include/asm/irqflags.h:40 ./arch/x86/include/asm/irqflags.h:75 arch/x86/mm/fault.c:1470 arch/x86/mm/fault.c:1518)\n ? asm_exc_page_fault (./arch/x86/include/asm/idtentry.h:570)\n ? iptable_nat_table_init (net/ipv4/netfilter/iptable_nat.c:87 net/ipv4/netfilter/iptable_nat.c:121) iptable_nat\n xt_find_table_lock (net/netfilter/x_tables.c:1259)\n xt_request_find_table_lock (net/netfilter/x_tables.c:1287)\n get_info (net/ipv4/netfilter/ip_tables.c:965)\n ? security_capable (security/security.c:809 (discriminator 13))\n ? ns_capable (kernel/capability.c:376 kernel/capability.c:397)\n ? do_ipt_get_ctl (net/ipv4/netfilter/ip_tables.c:1656)\n ? bpfilter_send_req (net/bpfilter/bpfilter_kern.c:52) bpfilter\n nf_getsockopt (net/netfilter/nf_sockopt.c:116)\n ip_getsockopt (net/ipv4/ip_sockglue.c:1827)\n __sys_getsockopt (net/socket.c:2327)\n __x64_sys_getsockopt (net/socket.c:2342 net/socket.c:2339 net/socket.c:2339)\n do_syscall_64 (arch/x86/entry/common.c:51 arch/x86/entry/common.c:81)\n entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)\nRIP: 0033:0x7f62844685ee\nCode: 48 8b 0d 45 28 0f 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 90 f3 0f 1e fa 49 89 ca b8 37 00 00 00 0f 05 \u003c48\u003e 3d 00 f0 ff ff 77 0a c3 66 0f 1f 84 00 00 00 00 00 48 8b 15 09\nRSP: 002b:00007ffd1f83d638 EFLAGS: 00000246 ORIG_RAX: 0000000000000037\nRAX: ffffffffffffffda RBX: 00007ffd1f83d680 RCX: 00007f62844685ee\nRDX: 0000000000000040 RSI: 0000000000000000 RDI: 0000000000000004\nRBP: 0000000000000004 R08: 00007ffd1f83d670 R09: 0000558798ffa2a0\nR10: 00007ffd1f83d680 R11: 0000000000000246 R12: 00007ffd1f83e3b2\nR13: 00007f6284\n---truncated---",
"id": "GHSA-q4p2-vxpc-3r2v",
"modified": "2025-11-04T00:31:12Z",
"published": "2024-08-17T09:30:24Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-42270"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/08ed888b69a22647153fe2bec55b7cd0a46102cc"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/5830aa863981d43560748aa93589c0695191d95d"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/70014b73d7539fcbb6b4ff5f37368d7241d8e626"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/95590a4929027769af35b153645c0ab6fd22b29b"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/b98ddb65fa1674b0e6b52de8af9103b63f51b643"
},
{
"type": "WEB",
"url": "https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-Q4W6-WQGP-2R7M
Vulnerability from github – Published: 2022-04-29 02:57 – Updated: 2024-02-16 00:30The Negotiate Security Software Provider (SSP) interface in Windows 2000, Windows XP, and Windows Server 2003, allows remote attackers to cause a denial of service (crash from null dereference) or execute arbitrary code via a crafted SPNEGO NegTokenInit request during authentication protocol selection.
{
"affected": [],
"aliases": [
"CVE-2004-0119"
],
"database_specific": {
"cwe_ids": [
"CWE-476"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2004-06-01T04:00:00Z",
"severity": "HIGH"
},
"details": "The Negotiate Security Software Provider (SSP) interface in Windows 2000, Windows XP, and Windows Server 2003, allows remote attackers to cause a denial of service (crash from null dereference) or execute arbitrary code via a crafted SPNEGO NegTokenInit request during authentication protocol selection.",
"id": "GHSA-q4w6-wqgp-2r7m",
"modified": "2024-02-16T00:30:27Z",
"published": "2022-04-29T02:57:10Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2004-0119"
},
{
"type": "WEB",
"url": "https://docs.microsoft.com/en-us/security-updates/securitybulletins/2004/ms04-011"
},
{
"type": "WEB",
"url": "https://exchange.xforce.ibmcloud.com/vulnerabilities/15715"
},
{
"type": "WEB",
"url": "https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A1808"
},
{
"type": "WEB",
"url": "https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A1962"
},
{
"type": "WEB",
"url": "https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A1997"
},
{
"type": "WEB",
"url": "http://archives.neohapsis.com/archives/vulnwatch/2004-q1/0081.html"
},
{
"type": "WEB",
"url": "http://www.ciac.org/ciac/bulletins/o-114.shtml"
},
{
"type": "WEB",
"url": "http://www.kb.cert.org/vuls/id/638548"
},
{
"type": "WEB",
"url": "http://www.securityfocus.com/bid/10113"
},
{
"type": "WEB",
"url": "http://www.us-cert.gov/cas/techalerts/TA04-104A.html"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-Q4XX-RWJ3-JF4M
Vulnerability from github – Published: 2026-02-14 18:30 – Updated: 2026-03-19 18:31In the Linux kernel, the following vulnerability has been resolved:
ipv6: Fix ECMP sibling count mismatch when clearing RTF_ADDRCONF
syzbot reported a kernel BUG in fib6_add_rt2node() when adding an IPv6 route. [0]
Commit f72514b3c569 ("ipv6: clear RA flags when adding a static route") introduced logic to clear RTF_ADDRCONF from existing routes when a static route with the same nexthop is added. However, this causes a problem when the existing route has a gateway.
When RTF_ADDRCONF is cleared from a route that has a gateway, that route becomes eligible for ECMP, i.e. rt6_qualify_for_ecmp() returns true. The issue is that this route was never added to the fib6_siblings list.
This leads to a mismatch between the following counts:
-
The sibling count computed by iterating fib6_next chain, which includes the newly ECMP-eligible route
-
The actual siblings in fib6_siblings list, which does not include that route
When a subsequent ECMP route is added, fib6_add_rt2node() hits BUG_ON(sibling->fib6_nsiblings != rt->fib6_nsiblings) because the counts don't match.
Fix this by only clearing RTF_ADDRCONF when the existing route does not have a gateway. Routes without a gateway cannot qualify for ECMP anyway (rt6_qualify_for_ecmp() requires fib_nh_gw_family), so clearing RTF_ADDRCONF on them is safe and matches the original intent of the commit.
[0]: kernel BUG at net/ipv6/ip6_fib.c:1217! Oops: invalid opcode: 0000 [#1] SMP KASAN PTI CPU: 0 UID: 0 PID: 6010 Comm: syz.0.17 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 RIP: 0010:fib6_add_rt2node+0x3433/0x3470 net/ipv6/ip6_fib.c:1217 [...] Call Trace: fib6_add+0x8da/0x18a0 net/ipv6/ip6_fib.c:1532 __ip6_ins_rt net/ipv6/route.c:1351 [inline] ip6_route_add+0xde/0x1b0 net/ipv6/route.c:3946 ipv6_route_ioctl+0x35c/0x480 net/ipv6/route.c:4571 inet6_ioctl+0x219/0x280 net/ipv6/af_inet6.c:577 sock_do_ioctl+0xdc/0x300 net/socket.c:1245 sock_ioctl+0x576/0x790 net/socket.c:1366 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:597 [inline] __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:583 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f
{
"affected": [],
"aliases": [
"CVE-2026-23200"
],
"database_specific": {
"cwe_ids": [
"CWE-476"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-02-14T17:15:57Z",
"severity": "MODERATE"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nipv6: Fix ECMP sibling count mismatch when clearing RTF_ADDRCONF\n\nsyzbot reported a kernel BUG in fib6_add_rt2node() when adding an IPv6\nroute. [0]\n\nCommit f72514b3c569 (\"ipv6: clear RA flags when adding a static\nroute\") introduced logic to clear RTF_ADDRCONF from existing routes\nwhen a static route with the same nexthop is added. However, this\ncauses a problem when the existing route has a gateway.\n\nWhen RTF_ADDRCONF is cleared from a route that has a gateway, that\nroute becomes eligible for ECMP, i.e. rt6_qualify_for_ecmp() returns\ntrue. The issue is that this route was never added to the\nfib6_siblings list.\n\nThis leads to a mismatch between the following counts:\n\n- The sibling count computed by iterating fib6_next chain, which\n includes the newly ECMP-eligible route\n\n- The actual siblings in fib6_siblings list, which does not include\n that route\n\nWhen a subsequent ECMP route is added, fib6_add_rt2node() hits\nBUG_ON(sibling-\u003efib6_nsiblings != rt-\u003efib6_nsiblings) because the\ncounts don\u0027t match.\n\nFix this by only clearing RTF_ADDRCONF when the existing route does\nnot have a gateway. Routes without a gateway cannot qualify for ECMP\nanyway (rt6_qualify_for_ecmp() requires fib_nh_gw_family), so clearing\nRTF_ADDRCONF on them is safe and matches the original intent of the\ncommit.\n\n[0]:\nkernel BUG at net/ipv6/ip6_fib.c:1217!\nOops: invalid opcode: 0000 [#1] SMP KASAN PTI\nCPU: 0 UID: 0 PID: 6010 Comm: syz.0.17 Not tainted syzkaller #0 PREEMPT(full)\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025\nRIP: 0010:fib6_add_rt2node+0x3433/0x3470 net/ipv6/ip6_fib.c:1217\n[...]\nCall Trace:\n \u003cTASK\u003e\n fib6_add+0x8da/0x18a0 net/ipv6/ip6_fib.c:1532\n __ip6_ins_rt net/ipv6/route.c:1351 [inline]\n ip6_route_add+0xde/0x1b0 net/ipv6/route.c:3946\n ipv6_route_ioctl+0x35c/0x480 net/ipv6/route.c:4571\n inet6_ioctl+0x219/0x280 net/ipv6/af_inet6.c:577\n sock_do_ioctl+0xdc/0x300 net/socket.c:1245\n sock_ioctl+0x576/0x790 net/socket.c:1366\n vfs_ioctl fs/ioctl.c:51 [inline]\n __do_sys_ioctl fs/ioctl.c:597 [inline]\n __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:583\n do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]\n do_syscall_64+0xfa/0xf80 arch/x86/entry/syscall_64.c:94\n entry_SYSCALL_64_after_hwframe+0x77/0x7f",
"id": "GHSA-q4xx-rwj3-jf4m",
"modified": "2026-03-19T18:31:14Z",
"published": "2026-02-14T18:30:16Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-23200"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/50b7c7a255858a85c4636a1e990ca04591153dca"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/b8ad2d53f706aeea833d23d45c0758398fede580"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/bbf4a17ad9ffc4e3d7ec13d73ecd59dea149ed25"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/d8143c54ceeba232dc8a13aa0afa14a44b371d93"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-Q527-GCW3-86JR
Vulnerability from github – Published: 2024-11-14 12:31 – Updated: 2025-01-24 18:31A null pointer dereference vulnerability in the GlobalProtect gateway in Palo Alto Networks PAN-OS software enables an unauthenticated attacker to stop the GlobalProtect service on the firewall by sending a specially crafted packet that causes a denial of service (DoS) condition. Repeated attempts to trigger this condition result in the firewall entering maintenance mode.
{
"affected": [],
"aliases": [
"CVE-2024-2550"
],
"database_specific": {
"cwe_ids": [
"CWE-476"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-11-14T10:15:04Z",
"severity": "HIGH"
},
"details": "A null pointer dereference vulnerability in the GlobalProtect gateway in Palo Alto Networks PAN-OS software enables an unauthenticated attacker to stop the GlobalProtect service on the firewall by sending a specially crafted packet that causes a denial of service (DoS) condition. Repeated attempts to trigger this condition result in the firewall entering maintenance mode.",
"id": "GHSA-q527-gcw3-86jr",
"modified": "2025-01-24T18:31:12Z",
"published": "2024-11-14T12:31:00Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-2550"
},
{
"type": "WEB",
"url": "https://security.paloaltonetworks.com/CVE-2024-2550"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:N/R:U/V:C/RE:M/U:Amber",
"type": "CVSS_V4"
}
]
}
GHSA-Q52Q-F54C-XMVP
Vulnerability from github – Published: 2024-02-26 18:30 – Updated: 2024-04-17 21:30In the Linux kernel, the following vulnerability has been resolved:
net: hso: fix NULL-deref on disconnect regression
Commit 8a12f8836145 ("net: hso: fix null-ptr-deref during tty device unregistration") fixed the racy minor allocation reported by syzbot, but introduced an unconditional NULL-pointer dereference on every disconnect instead.
Specifically, the serial device table must no longer be accessed after the minor has been released by hso_serial_tty_unregister().
{
"affected": [],
"aliases": [
"CVE-2021-46905"
],
"database_specific": {
"cwe_ids": [
"CWE-476"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-02-26T16:27:45Z",
"severity": "MODERATE"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: hso: fix NULL-deref on disconnect regression\n\nCommit 8a12f8836145 (\"net: hso: fix null-ptr-deref during tty device\nunregistration\") fixed the racy minor allocation reported by syzbot, but\nintroduced an unconditional NULL-pointer dereference on every disconnect\ninstead.\n\nSpecifically, the serial device table must no longer be accessed after\nthe minor has been released by hso_serial_tty_unregister().",
"id": "GHSA-q52q-f54c-xmvp",
"modified": "2024-04-17T21:30:45Z",
"published": "2024-02-26T18:30:28Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2021-46905"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/0c71d4c89559f72cec2592d078681a843bce570e"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/0f000005da31f6947f843ce6b3e3a960540c6e00"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/24b699bea7553fc0b98dad9d864befb6005ac7f1"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/2ad5692db72874f02b9ad551d26345437ea4f7f3"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/41c44e1f3112d7265dae522c026399b2a42d19ef"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/5871761c5f0f20d6e98bf3b6bd7486d857589554"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/5c17cfe155d21954b4c7e2a78fa771cebcd86725"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/90642ee9eb581a13569b1c0bd57e85d962215273"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/d7fad2ce15bdbbd0fec3ebe999fd7cab2267f53e"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-Q53M-FM85-X9W5
Vulnerability from github – Published: 2025-10-03 21:30 – Updated: 2025-10-08 21:30A NULL pointer dereference vulnerability has been reported to affect several QNAP operating system versions. If a remote attacker gains an administrator account, they can then exploit the vulnerability to launch a denial-of-service (DoS) attack.
We have already fixed the vulnerability in the following versions: QTS 5.2.6.3195 build 20250715 and later QuTS hero h5.2.6.3195 build 20250715 and later
{
"affected": [],
"aliases": [
"CVE-2025-48727"
],
"database_specific": {
"cwe_ids": [
"CWE-476"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-10-03T19:15:44Z",
"severity": "MODERATE"
},
"details": "A NULL pointer dereference vulnerability has been reported to affect several QNAP operating system versions. If a remote attacker gains an administrator account, they can then exploit the vulnerability to launch a denial-of-service (DoS) attack.\n\nWe have already fixed the vulnerability in the following versions:\nQTS 5.2.6.3195 build 20250715 and later\nQuTS hero h5.2.6.3195 build 20250715 and later",
"id": "GHSA-q53m-fm85-x9w5",
"modified": "2025-10-08T21:30:23Z",
"published": "2025-10-03T21:30:57Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-48727"
},
{
"type": "WEB",
"url": "https://www.qnap.com/en/security-advisory/qsa-25-36"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
"type": "CVSS_V4"
}
]
}
GHSA-Q56F-P5H4-MJCF
Vulnerability from github – Published: 2024-10-21 12:30 – Updated: 2026-05-12 12:32In the Linux kernel, the following vulnerability has been resolved:
drm/amd/display: Check link_res->hpo_dp_link_enc before using it
[WHAT & HOW] Functions dp_enable_link_phy and dp_disable_link_phy can pass link_res without initializing hpo_dp_link_enc and it is necessary to check for null before dereferencing.
This fixes 2 FORWARD_NULL issues reported by Coverity.
{
"affected": [],
"aliases": [
"CVE-2024-47704"
],
"database_specific": {
"cwe_ids": [
"CWE-476"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-10-21T12:15:06Z",
"severity": "MODERATE"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amd/display: Check link_res-\u003ehpo_dp_link_enc before using it\n\n[WHAT \u0026 HOW]\nFunctions dp_enable_link_phy and dp_disable_link_phy can pass link_res\nwithout initializing hpo_dp_link_enc and it is necessary to check for\nnull before dereferencing.\n\nThis fixes 2 FORWARD_NULL issues reported by Coverity.",
"id": "GHSA-q56f-p5h4-mjcf",
"modified": "2026-05-12T12:32:10Z",
"published": "2024-10-21T12:30:55Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-47704"
},
{
"type": "WEB",
"url": "https://cert-portal.siemens.com/productcert/html/ssa-032379.html"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/0508a4e95ac1aefd851ceb97ea050d8abb93262c"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/0beca868cde8742240cd0038141c30482d2b7eb8"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/530e29452b955c30cf2102fa4d07420dc6e0c953"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/8c22a62288194f072eb3a51045b700fce1c18d9e"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/be2ca7a2c1561390d28bf2f92654d819659ba510"
},
{
"type": "WEB",
"url": "https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
Mitigation MIT-56
For any pointers that could have been modified or provided from a function that can return NULL, check the pointer for NULL before use. When working with a multithreaded or otherwise asynchronous environment, ensure that proper locking APIs are used to lock before the check, and unlock when it has finished [REF-1484].
Mitigation
Select a programming language that is not susceptible to these issues.
Mitigation
Check the results of all functions that return a value and verify that the value is non-null before acting upon it.
Mitigation
Identify all variables and data stores that receive information from external sources, and apply input validation to make sure that they are only initialized to expected values.
Mitigation
Explicitly initialize all variables and other data stores, either during declaration or just before the first usage.
No CAPEC attack patterns related to this CWE.