GHSA-8XV3-WJFW-QM6V
Vulnerability from github – Published: 2026-08-15 06:32 – Updated: 2026-08-15 06:32In the Linux kernel, the following vulnerability has been resolved:
afs: fix NULL pointer dereference in afs_get_tree()
afs_alloc_sbi() uses kzalloc for memory allocation. And, if ctx->dyn_root is not null, as->cell and as->volume are null. In trace_afs_get_tree() they are dereferenced.
KASAN error message:
KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] CPU: 2 PID: 18478 Comm: syz-executor.7 Not tainted 5.10.246-syzkaller #0 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:perf_trace_afs_get_tree+0x1d9/0x550 include/trace/events/afs.h:1365
Call Trace: trace_afs_get_tree include/trace/events/afs.h:1365 [inline] afs_get_tree+0x922/0x1350 fs/afs/super.c:599 vfs_get_tree+0x8e/0x300 fs/super.c:1572 do_new_mount fs/namespace.c:3011 [inline] path_mount+0x14a5/0x2220 fs/namespace.c:3341 do_mount fs/namespace.c:3354 [inline] __do_sys_mount fs/namespace.c:3562 [inline] __se_sys_mount fs/namespace.c:3539 [inline] __x64_sys_mount+0x283/0x300 fs/namespace.c:3539 do_syscall_64+0x33/0x50 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x67/0xd1
Found by Linux Verification Center (linuxtesting.org) with Syzkaller.
{
"affected": [],
"aliases": [
"CVE-2026-74426"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-08-15T06:22:44Z",
"severity": null
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nafs: fix NULL pointer dereference in afs_get_tree()\n\nafs_alloc_sbi() uses kzalloc for memory allocation. And, if\nctx-\u003edyn_root is not null, as-\u003ecell and as-\u003evolume are null.\nIn trace_afs_get_tree() they are dereferenced.\n\nKASAN error message:\n\nKASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]\nCPU: 2 PID: 18478 Comm: syz-executor.7 Not tainted 5.10.246-syzkaller #0\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1\n04/01/2014\nRIP: 0010:perf_trace_afs_get_tree+0x1d9/0x550\ninclude/trace/events/afs.h:1365\n\nCall Trace:\ntrace_afs_get_tree include/trace/events/afs.h:1365 [inline]\nafs_get_tree+0x922/0x1350 fs/afs/super.c:599\nvfs_get_tree+0x8e/0x300 fs/super.c:1572\ndo_new_mount fs/namespace.c:3011 [inline]\npath_mount+0x14a5/0x2220 fs/namespace.c:3341\ndo_mount fs/namespace.c:3354 [inline]\n__do_sys_mount fs/namespace.c:3562 [inline]\n__se_sys_mount fs/namespace.c:3539 [inline]\n__x64_sys_mount+0x283/0x300 fs/namespace.c:3539\n do_syscall_64+0x33/0x50 arch/x86/entry/common.c:46\nentry_SYSCALL_64_after_hwframe+0x67/0xd1\n\nFound by Linux Verification Center (linuxtesting.org) with Syzkaller.",
"id": "GHSA-8xv3-wjfw-qm6v",
"modified": "2026-08-15T06:32:33Z",
"published": "2026-08-15T06:32:33Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-74426"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/0b70716081c6462be9b2928ad736d0d527b09678"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/23b3d457d8387bcb2a61063a9e520063ada9335f"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/67fb48c4a0874953212321cd5d57fdb4900dbc31"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/70b2842734d831c908474779bb8a76daf55f782c"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/867b3ea146a041023bfcd258e6db516b1bb28f19"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/d5b17474feed3c30991f07affa2473adbad95055"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/d648cc2069eb081707c061849046d909f57c78b1"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/ea19edf71721cd42f923e3c70f4ff995b422fe3b"
}
],
"schema_version": "1.4.0",
"severity": []
}
Sightings
| Author | Source | Type | Date | Other |
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Nomenclature
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