CWE-193
AllowedOff-by-one Error
Abstraction: Base · Status: Draft
A product calculates or uses an incorrect maximum or minimum value that is 1 more, or 1 less, than the correct value.
274 vulnerabilities reference this CWE, most recent first.
GHSA-MFC2-6J6Q-99VP
Vulnerability from github – Published: 2026-06-24 18:32 – Updated: 2026-07-15 15:32In the Linux kernel, the following vulnerability has been resolved:
bpf, arm64: Fix off-by-one in check_imm signed range check
check_imm(bits, imm) is used in the arm64 BPF JIT to verify that a branch displacement (in arm64 instruction units) fits into the signed N-bit immediate field of a B, B.cond or CBZ/CBNZ encoding before it is handed to the encoder. The macro currently tests for (imm > 0 && imm >> bits) || (imm < 0 && ~imm >> bits) which admits values in [-2^N, 2^N) — effectively a signed (N+1)-bit range. A signed N-bit field only holds [-2^(N-1), 2^(N-1)), so the check admits one extra bit of range on each side.
In particular, for check_imm19(), values in [2^18, 2^19) slip past the check but do not fit into the 19-bit signed imm19 field of B.cond. aarch64_insn_encode_immediate() then masks the raw value into the 19-bit field, setting bit 18 (the sign bit) and flipping a forward branch into a backward one. Same class of issue exists for check_imm26() and the B/BL encoding. Shift by (bits - 1) instead of bits so the actual signed N-bit range is enforced.
{
"affected": [],
"aliases": [
"CVE-2026-53036"
],
"database_specific": {
"cwe_ids": [
"CWE-193"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-06-24T17:17:15Z",
"severity": "HIGH"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf, arm64: Fix off-by-one in check_imm signed range check\n\ncheck_imm(bits, imm) is used in the arm64 BPF JIT to verify that\na branch displacement (in arm64 instruction units) fits into the\nsigned N-bit immediate field of a B, B.cond or CBZ/CBNZ encoding\nbefore it is handed to the encoder. The macro currently tests for\n(imm \u003e 0 \u0026\u0026 imm \u003e\u003e bits) || (imm \u003c 0 \u0026\u0026 ~imm \u003e\u003e bits) which admits\nvalues in [-2^N, 2^N) \u2014 effectively a signed (N+1)-bit range. A\nsigned N-bit field only holds [-2^(N-1), 2^(N-1)), so the check\nadmits one extra bit of range on each side.\n\nIn particular, for check_imm19(), values in [2^18, 2^19) slip past\nthe check but do not fit into the 19-bit signed imm19 field of\nB.cond. aarch64_insn_encode_immediate() then masks the raw value\ninto the 19-bit field, setting bit 18 (the sign bit) and flipping\na forward branch into a backward one. Same class of issue exists\nfor check_imm26() and the B/BL encoding. Shift by (bits - 1)\ninstead of bits so the actual signed N-bit range is enforced.",
"id": "GHSA-mfc2-6j6q-99vp",
"modified": "2026-07-15T15:32:45Z",
"published": "2026-06-24T18:32:44Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-53036"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/1a113b5497297871699cd498b1b83542e0db7f15"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/1dd8be4ec722ce54e4cace59f3a4ba658111b3ec"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/6927f0d6794aa73318bbfa929f1ff6065b0620df"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/7fd3b41260c6120e7b60164afea5d961af6224f9"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/a5dfeb3b61065039488342d43ae06d4729d955d4"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/fb74defa1cca1a73177c0c761e641332e4f979a3"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-MQVV-MHQ8-MX45
Vulnerability from github – Published: 2026-06-24 18:32 – Updated: 2026-06-28 09:31In the Linux kernel, the following vulnerability has been resolved:
net: bcmgenet: fix off-by-one in bcmgenet_put_txcb
The write_ptr points to the next open tx_cb. We want to return the tx_cb that gets rewinded, so we must rewind the pointer first then return the tx_cb that it points to. That way the txcb can be correctly cleaned up.
{
"affected": [],
"aliases": [
"CVE-2026-53088"
],
"database_specific": {
"cwe_ids": [
"CWE-193"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-06-24T17:17:22Z",
"severity": "CRITICAL"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: bcmgenet: fix off-by-one in bcmgenet_put_txcb\n\nThe write_ptr points to the next open tx_cb. We want to return the\ntx_cb that gets rewinded, so we must rewind the pointer first then\nreturn the tx_cb that it points to. That way the txcb can be correctly\ncleaned up.",
"id": "GHSA-mqvv-mhq8-mx45",
"modified": "2026-06-28T09:31:41Z",
"published": "2026-06-24T18:32:46Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-53088"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/14e9f86564fff7bcf7f45c1b69080e837b31d185"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/29394f722f620281f2ee9a47f947734e53d72c90"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/2a74590170427a3ca7cc4bb8690cdd559129c29c"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/4cab761fc51c65aef741fcece4a18f3554edbc09"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/57f3f53d2c9c5a9e133596e2f7bc1c50688a6d38"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/72df896e31ddd06fcc5a789f025ad7a62a18bc9b"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/85f34ec320d3881badfd4edc5fee5cd5012bb54d"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/fb9a3c1f547d0ff024dbfe7b6f327626ddf0a3de"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-MX97-6HP9-H76Q
Vulnerability from github – Published: 2024-08-17 12:30 – Updated: 2024-08-20 21:30In the Linux kernel, the following vulnerability has been resolved:
hwmon: (ltc2991) re-order conditions to fix off by one bug
LTC2991_T_INT_CH_NR is 4. The st->temp_en[] array has LTC2991_MAX_CHANNEL (4) elements. Thus if "channel" is equal to LTC2991_T_INT_CH_NR then we have read one element beyond the end of the array. Flip the conditions around so that we check if "channel" is valid before using it as an array index.
{
"affected": [],
"aliases": [
"CVE-2024-43852"
],
"database_specific": {
"cwe_ids": [
"CWE-193"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-08-17T10:15:10Z",
"severity": "HIGH"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nhwmon: (ltc2991) re-order conditions to fix off by one bug\n\nLTC2991_T_INT_CH_NR is 4. The st-\u003etemp_en[] array has LTC2991_MAX_CHANNEL\n(4) elements. Thus if \"channel\" is equal to LTC2991_T_INT_CH_NR then we\nhave read one element beyond the end of the array. Flip the conditions\naround so that we check if \"channel\" is valid before using it as an array\nindex.",
"id": "GHSA-mx97-6hp9-h76q",
"modified": "2024-08-20T21:30:32Z",
"published": "2024-08-17T12:30:33Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-43852"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/99bf7c2eccff82760fa23ce967cc67c8c219c6a6"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/c180311c0a520692e2d0e9ca44dcd6c2ff1b41c4"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-MX9G-MG46-CF6G
Vulnerability from github – Published: 2022-04-30 18:18 – Updated: 2024-02-08 03:32Off-by-one buffer overflow in Basic Authentication in Acme Labs thttpd 1.95 through 2.20 allows remote attackers to cause a denial of service and possibly execute arbitrary code.
{
"affected": [],
"aliases": [
"CVE-2001-1496"
],
"database_specific": {
"cwe_ids": [
"CWE-193"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2001-12-31T05:00:00Z",
"severity": "HIGH"
},
"details": "Off-by-one buffer overflow in Basic Authentication in Acme Labs thttpd 1.95 through 2.20 allows remote attackers to cause a denial of service and possibly execute arbitrary code.",
"id": "GHSA-mx9g-mg46-cf6g",
"modified": "2024-02-08T03:32:42Z",
"published": "2022-04-30T18:18:09Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2001-1496"
},
{
"type": "WEB",
"url": "https://exchange.xforce.ibmcloud.com/vulnerabilities/7595"
},
{
"type": "WEB",
"url": "http://www.securityfocus.com/archive/1/241310"
},
{
"type": "WEB",
"url": "http://www.securityfocus.com/archive/1/241953"
},
{
"type": "WEB",
"url": "http://www.securityfocus.com/bid/3562"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-MXVH-95QR-WW4V
Vulnerability from github – Published: 2022-04-29 01:26 – Updated: 2024-02-16 21:31Multiple off-by-one vulnerabilities in Ethereal 0.9.11 and earlier allow remote attackers to cause a denial of service and possibly execute arbitrary code via the (1) AIM, (2) GIOP Gryphon, (3) OSPF, (4) PPTP, (5) Quake, (6) Quake2, (7) Quake3, (8) Rsync, (9) SMB, (10) SMPP, and (11) TSP dissectors, which do not properly use the tvb_get_nstringz and tvb_get_nstringz0 functions.
{
"affected": [],
"aliases": [
"CVE-2003-0356"
],
"database_specific": {
"cwe_ids": [
"CWE-193"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2003-06-09T04:00:00Z",
"severity": "HIGH"
},
"details": "Multiple off-by-one vulnerabilities in Ethereal 0.9.11 and earlier allow remote attackers to cause a denial of service and possibly execute arbitrary code via the (1) AIM, (2) GIOP Gryphon, (3) OSPF, (4) PPTP, (5) Quake, (6) Quake2, (7) Quake3, (8) Rsync, (9) SMB, (10) SMPP, and (11) TSP dissectors, which do not properly use the tvb_get_nstringz and tvb_get_nstringz0 functions.",
"id": "GHSA-mxvh-95qr-ww4v",
"modified": "2024-02-16T21:31:28Z",
"published": "2022-04-29T01:26:17Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2003-0356"
},
{
"type": "WEB",
"url": "https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A69"
},
{
"type": "WEB",
"url": "http://www.debian.org/security/2003/dsa-313"
},
{
"type": "WEB",
"url": "http://www.ethereal.com/appnotes/enpa-sa-00009.html"
},
{
"type": "WEB",
"url": "http://www.kb.cert.org/vuls/id/641013"
},
{
"type": "WEB",
"url": "http://www.mandriva.com/security/advisories?name=MDKSA-2003:067"
},
{
"type": "WEB",
"url": "http://www.redhat.com/support/errata/RHSA-2003-077.html"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-P2CC-X7HQ-6JVM
Vulnerability from github – Published: 2026-06-25 21:31 – Updated: 2026-06-25 21:31CANBoat through 6.22, fixed in commit a5a22b7, contains an off-by-one global buffer overflow in the searchForPgn() function in analyzer/pgn.c that allows remote attackers to crash the application. Attackers can deliver a crafted NMEA-2000 message with an out-of-range PGN value over CAN bus or N2K-over-IP to trigger an out-of-bounds array access and denial of service.
{
"affected": [],
"aliases": [
"CVE-2026-56790"
],
"database_specific": {
"cwe_ids": [
"CWE-193"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-06-25T19:16:45Z",
"severity": "HIGH"
},
"details": "CANBoat through 6.22, fixed in commit a5a22b7, contains an off-by-one global buffer overflow in the searchForPgn() function in analyzer/pgn.c that allows remote attackers to crash the application. Attackers can deliver a crafted NMEA-2000 message with an out-of-range PGN value over CAN bus or N2K-over-IP to trigger an out-of-bounds array access and denial of service.",
"id": "GHSA-p2cc-x7hq-6jvm",
"modified": "2026-06-25T21:31:30Z",
"published": "2026-06-25T21:31:30Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-56790"
},
{
"type": "WEB",
"url": "https://github.com/canboat/canboat/issues/644"
},
{
"type": "WEB",
"url": "https://github.com/canboat/canboat/pull/649"
},
{
"type": "WEB",
"url": "https://github.com/canboat/canboat/commit/a5a22b74b9ac5688019cba62669df08562cebd6f"
},
{
"type": "WEB",
"url": "https://www.vulncheck.com/advisories/canboat-off-by-one-global-buffer-overflow-in-searchforpgn"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:L/VI:H/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:X/R:X/V:X/RE:X/U:X",
"type": "CVSS_V4"
}
]
}
GHSA-P64Q-3RGX-WMVR
Vulnerability from github – Published: 2026-05-21 09:32 – Updated: 2026-05-21 09:32An off-by-two error in lp_write() in papd in Netatalk 2.0.0 through 4.4.2 allows an adjacent network attacker to modify limited data or cause a minor service disruption via crafted print data.
{
"affected": [],
"aliases": [
"CVE-2026-44065"
],
"database_specific": {
"cwe_ids": [
"CWE-193"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-05-21T08:16:22Z",
"severity": "MODERATE"
},
"details": "An off-by-two error in lp_write() in papd in Netatalk 2.0.0 through 4.4.2 allows an adjacent network attacker to modify limited data or cause a minor service disruption via crafted print data.",
"id": "GHSA-p64q-3rgx-wmvr",
"modified": "2026-05-21T09:32:10Z",
"published": "2026-05-21T09:32:10Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-44065"
},
{
"type": "WEB",
"url": "https://netatalk.io/security/CVE-2026-44065"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:L",
"type": "CVSS_V3"
}
]
}
GHSA-P66J-QJ5C-Q58G
Vulnerability from github – Published: 2026-03-18 18:31 – Updated: 2026-05-21 00:30In the Linux kernel, the following vulnerability has been resolved:
net: liquidio: Fix off-by-one error in PF setup_nic_devices() cleanup
In setup_nic_devices(), the initialization loop jumps to the label setup_nic_dev_free on failure. The current cleanup loop while(i--) skip the failing index i, causing a memory leak.
Fix this by changing the loop to iterate from the current index i down to 0.
Also, decrement i in the devlink_alloc failure path to point to the last successfully allocated index.
Compile tested only. Issue found using code review.
{
"affected": [],
"aliases": [
"CVE-2026-23257"
],
"database_specific": {
"cwe_ids": [
"CWE-193"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-03-18T18:16:23Z",
"severity": "MODERATE"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: liquidio: Fix off-by-one error in PF setup_nic_devices() cleanup\n\nIn setup_nic_devices(), the initialization loop jumps to the label\nsetup_nic_dev_free on failure. The current cleanup loop while(i--)\nskip the failing index i, causing a memory leak.\n\nFix this by changing the loop to iterate from the current index i\ndown to 0.\n\nAlso, decrement i in the devlink_alloc failure path to point to the\nlast successfully allocated index.\n\nCompile tested only. Issue found using code review.",
"id": "GHSA-p66j-qj5c-q58g",
"modified": "2026-05-21T00:30:26Z",
"published": "2026-03-18T18:31:18Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-23257"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/293eaad0d6d6b2a37a458c7deb7be345349cd963"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/8558aef4e8a1a83049ab906d21d391093cfa7e7f"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/a0d2389c8cdc1f05de5eb8663bffe9ed05dca769"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/af38d9a5cb49fe9d0d282b44f17fdc1f3270d99d"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/d86c58eb005eb99da402452f3db7a6e0eae32815"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/f1216b80c9040a904d2ad7c8cd24ca0ff1f36932"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/f86bd16280a0f88b538394e0565c56ce4756da99"
}
],
"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-P9R5-QPP4-RJG3
Vulnerability from github – Published: 2026-05-28 21:32 – Updated: 2026-05-29 00:38Music Player Daemon (MPD) before version 0.24.11 contains a stack buffer overflow vulnerability in the pcm_unpack_24be function in src/pcm/Pack.cxx that allows unauthenticated attackers to corrupt stack memory by triggering an off-by-one write in the PCM decoder plugin. Attackers can issue two MPD commands referencing a malicious HTTP audio source to cause the unpack loop to write 1366 entries into a 1365-entry buffer, overwriting four bytes past the array boundary with three attacker-controlled bytes from an HTTP response body, resulting in daemon termination or potential code execution.
{
"affected": [],
"aliases": [
"CVE-2026-49127"
],
"database_specific": {
"cwe_ids": [
"CWE-193"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-05-28T20:16:26Z",
"severity": "HIGH"
},
"details": "Music Player Daemon (MPD) before version 0.24.11 contains a stack buffer overflow vulnerability in the pcm_unpack_24be function in src/pcm/Pack.cxx that allows unauthenticated attackers to corrupt stack memory by triggering an off-by-one write in the PCM decoder plugin. Attackers can issue two MPD commands referencing a malicious HTTP audio source to cause the unpack loop to write 1366 entries into a 1365-entry buffer, overwriting four bytes past the array boundary with three attacker-controlled bytes from an HTTP response body, resulting in daemon termination or potential code execution.",
"id": "GHSA-p9r5-qpp4-rjg3",
"modified": "2026-05-29T00:38:32Z",
"published": "2026-05-28T21:32:04Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-49127"
},
{
"type": "WEB",
"url": "https://github.com/MusicPlayerDaemon/MPD/issues/2485"
},
{
"type": "WEB",
"url": "https://github.com/MusicPlayerDaemon/MPD/commit/59911028c020f84bc2e669da6a1ef88121301274"
},
{
"type": "WEB",
"url": "https://github.com/MusicPlayerDaemon/MPD/releases/tag/v0.24.11"
},
{
"type": "WEB",
"url": "https://mstreet97.github.io/security-research/opensource/vulnerability-disclosure/cybersecurity/cve/2026/05/25/Four_Bugs_Reachable_nc.html"
},
{
"type": "WEB",
"url": "https://raw.githubusercontent.com/MusicPlayerDaemon/MPD/v0.24.11/NEWS"
},
{
"type": "WEB",
"url": "https://www.musicpd.org/news/2026/05/mpd-0-24-11-released"
},
{
"type": "WEB",
"url": "https://www.vulncheck.com/advisories/music-player-daemon-stack-buffer-overflow-via-pcm-unpack-24be"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/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:X/R:X/V:X/RE:X/U:X",
"type": "CVSS_V4"
}
]
}
GHSA-PQ56-R999-WPFM
Vulnerability from github – Published: 2024-05-01 06:31 – Updated: 2024-12-23 21:30In the Linux kernel, the following vulnerability has been resolved:
usb: typec: tcpm: Correct the PDO counting in pd_set
Off-by-one errors happen because nr_snk_pdo and nr_src_pdo are incorrectly added one. The index of the loop is equal to the number of PDOs to be updated when leaving the loop and it doesn't need to be added one.
When doing the power negotiation, TCPM relies on the "nr_snk_pdo" as the size of the local sink PDO array to match the Source capabilities of the partner port. If the off-by-one overflow occurs, a wrong RDO might be sent and unexpected power transfer might happen such as over voltage or over current (than expected).
"nr_src_pdo" is used to set the Rp level when the port is in Source role. It is also the array size of the local Source capabilities when filling up the buffer which will be sent as the Source PDOs (such as in Power Negotiation). If the off-by-one overflow occurs, a wrong Rp level might be set and wrong Source PDOs will be sent to the partner port. This could potentially cause over current or port resets.
{
"affected": [],
"aliases": [
"CVE-2024-26995"
],
"database_specific": {
"cwe_ids": [
"CWE-193"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-05-01T06:15:17Z",
"severity": "HIGH"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nusb: typec: tcpm: Correct the PDO counting in pd_set\n\nOff-by-one errors happen because nr_snk_pdo and nr_src_pdo are\nincorrectly added one. The index of the loop is equal to the number of\nPDOs to be updated when leaving the loop and it doesn\u0027t need to be added\none.\n\nWhen doing the power negotiation, TCPM relies on the \"nr_snk_pdo\" as\nthe size of the local sink PDO array to match the Source capabilities\nof the partner port. If the off-by-one overflow occurs, a wrong RDO\nmight be sent and unexpected power transfer might happen such as over\nvoltage or over current (than expected).\n\n\"nr_src_pdo\" is used to set the Rp level when the port is in Source\nrole. It is also the array size of the local Source capabilities when\nfilling up the buffer which will be sent as the Source PDOs (such as\nin Power Negotiation). If the off-by-one overflow occurs, a wrong Rp\nlevel might be set and wrong Source PDOs will be sent to the partner\nport. This could potentially cause over current or port resets.",
"id": "GHSA-pq56-r999-wpfm",
"modified": "2024-12-23T21:30:50Z",
"published": "2024-05-01T06:31:43Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-26995"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/c4128304c2169b4664ed6fb6200f228cead2ab70"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/f3da3192cdd3fefe213390e976eec424a8e270b5"
},
{
"type": "WEB",
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/4EZ6PJW7VOZ224TD7N4JZNU6KV32ZJ53"
},
{
"type": "WEB",
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/DAMSOZXJEPUOXW33WZYWCVAY7Z5S7OOY"
},
{
"type": "WEB",
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/GCBZZEC7L7KTWWAS2NLJK6SO3IZIL4WW"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
Mitigation
When copying character arrays or using character manipulation methods, the correct size parameter must be used to account for the null terminator that needs to be added at the end of the array. Some examples of functions susceptible to this weakness in C include strcpy(), strncpy(), strcat(), strncat(), printf(), sprintf(), scanf() and sscanf().
No CAPEC attack patterns related to this CWE.