{"id":"CVE-2026-43112","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nfs/smb/client: fix out-of-bounds read in cifs_sanitize_prepath\n\nWhen cifs_sanitize_prepath is called with an empty string or a string\ncontaining only delimiters (e.g., …","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nfs/smb/client: fix out-of-bounds read in cifs_sanitize_prepath\n\nWhen cifs_sanitize_prepath is called with an empty string or a string\ncontaining only delimiters (e.g., …","severity":"high","cvss":8.8,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","cwe":["CWE-125"],"vendor":"linux","product":"linux_kernel","affected":["linux_kernel >= 5.16.1, < 6.6.136","linux_kernel >= 6.7, < 6.12.83","linux_kernel >= 6.13, < 6.18.24","linux_kernel >= 6.19, < 6.19.14","linux_kernel = 5.16","linux_kernel = 7.0"],"patched":["linux_kernel 6.19.14"],"published":"2026-05-06","updated":"2026-09-18","sourceUpdated":"2026-09-18T13:18:22.990","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-43112","references":[{"url":"https://git.kernel.org/stable/c/2d29214448ec0f4e7e18bb1c14dd4a6c07f1c439","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/49b1ce6d7cfb6c5a49f68bf5ccfcfb6ba14e63c3","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/5d4fe469fe7dbff7d874c196bb680a82f2625d95","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/78ec5bf2f589ec7fd8f169394bfeca541b077317","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/86f9c23e0814cfdffda9eedf0c591c51ba209010","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/a2ba20c17de8eb028f96b1d85f119d3d25655bd9","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/fbced33599653471b4581dfe1abc7b467031f126","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://access.redhat.com/errata/RHSA-2026:34911","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:36018","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:36365","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:36366","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:40764","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:52649","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:52764","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:53989","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:53990","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:56573","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:57402","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:57457","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:57543","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:59662","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:59663","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:59831","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:60019","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:62409","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:62549","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:62558","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:62637","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:62638","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:62639","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:62640","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:62641","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:62642","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:65839","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:65851","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/security/cve/CVE-2026-43112","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2467015","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-43112.json","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-43112"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-43112"},{"url":"https://lore.kernel.org/linux-cve-announce/2026050625-CVE-2026-43112-f37f@gregkh/T"}],"tags":["nvd","cve.org","csaf","vex","red-hat"],"epss":0.00352,"epssPercentile":0.28935,"scores":{"nvd":8.8,"vendor":8.1,"cna":8.8},"ingestedAt":"2026-07-03T14:03:37.025Z","slug":"CVE-2026-43112","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nfs/smb/client: fix out-of-bounds read in cifs_sanitize_prepath\n\nWhen cifs_sanitize_prepath is called with an empty string or a string\ncontaining only delimiters (e.g., \"/\"), the current logic attempts to\ncheck *(cursor2 - 1) before cursor2 has advanced. This results in an\nout-of-bounds read.\n\nThis patch adds an early exit check after stripping prepended\ndelimiters. If no path content remains, the function returns NULL.\n\nThe bug was identified via manual audit and verified using a\nstandalone test case compiled with AddressSanitizer, which\ntriggered a SEGV on affected inputs.\n\n## Affected\n\n- `linux_kernel >= 5.16.1, < 6.6.136`\n- `linux_kernel >= 6.7, < 6.12.83`\n- `linux_kernel >= 6.13, < 6.18.24`\n- `linux_kernel >= 6.19, < 6.19.14`\n- `linux_kernel = 5.16`\n- `linux_kernel = 7.0`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `linux_kernel 6.19.14`\n\n## Vendor advisories\n\n- **RHSA-2026:59831** · Red Hat · fixed in: Red Hat OpenShift Container Platform 4.12 · released 2026-09-03 · [advisory](https://access.redhat.com/errata/RHSA-2026:59831)\n- **RHSA-2026:62549** · Red Hat · fixed in: Red Hat OpenShift Container Platform 4.16 · released 2026-09-10 · [advisory](https://access.redhat.com/errata/RHSA-2026:62549)\n- **RHSA-2026:60019** · Red Hat · fixed in: Red Hat OpenShift Container Platform 4.17 · released 2026-09-03 · [advisory](https://access.redhat.com/errata/RHSA-2026:60019)\n- **RHSA-2026:57402** · Red Hat · fixed in: Red Hat OpenShift Container Platform 4.19 · released 2026-08-26 · [advisory](https://access.redhat.com/errata/RHSA-2026:57402)\n- **RHSA-2026:57543** · Red Hat · fixed in: Red Hat OpenShift Container Platform 4.20 · released 2026-08-25 · [advisory](https://access.redhat.com/errata/RHSA-2026:57543)\n- **RHSA-2026:57457** · Red Hat · fixed in: Red Hat OpenShift Container Platform 4.21 · released 2026-08-25 · [advisory](https://access.redhat.com/errata/RHSA-2026:57457)\n- **RHSA-2026:40764** · Red Hat · fixed in: Red Hat OpenShift Container Platform 4.22 · released 2026-07-21 · [advisory](https://access.redhat.com/errata/RHSA-2026:40764)\n- **RHSA-2026:52764** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream EUS (v. 10.0), Red Hat Enterprise Linux BaseOS EUS (v. 10.0), Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0), Red Hat Enterprise Linux Real Time for NFV EUS (v. 10.0), Red Hat Enterprise Linux Real Time EUS (v. 10.0) · released 2026-08-10 · [advisory](https://access.redhat.com/errata/RHSA-2026:52764)\n- **RHSA-2026:34911** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 10), Red Hat Enterprise Linux BaseOS (v. 10), Red Hat Enterprise Linux CodeReady Linux Builder (v. 10), Red Hat Enterprise Linux Real Time for NFV (v. 10), Red Hat Enterprise Linux Real Time (v. 10) · released 2026-07-02 · [advisory](https://access.redhat.com/errata/RHSA-2026:34911)\n- **RHSA-2026:59662** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream E4S (v.9.2), Red Hat Enterprise Linux BaseOS E4S (v.9.2) · released 2026-08-26 · [advisory](https://access.redhat.com/errata/RHSA-2026:59662)\n- **RHSA-2026:56573** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream E4S (v.9.4), Red Hat Enterprise Linux BaseOS E4S (v.9.4), Red Hat Enterprise Linux Real Time for NFV E4S (v.9.4), Red Hat Enterprise Linux Real Time E4S (v.9.4) · released 2026-08-19 · [advisory](https://access.redhat.com/errata/RHSA-2026:56573)\n- **Red Hat VEX** · Important · affected: Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · no fix planned: Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · updated 2026-09-17 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-43112.json)\n- **RHSA-2026:62409** · Red Hat · fixed in: Red Hat OpenShift Container Platform 4.14 · released 2026-09-14 · [advisory](https://access.redhat.com/errata/RHSA-2026:62409)\n- **RHSA-2026:65851** · Red Hat · fixed in: Red Hat OpenShift Container Platform 4.18 · released 2026-09-17 · [advisory](https://access.redhat.com/errata/RHSA-2026:65851)\n- **RHSA-2026:65839** · Red Hat · fixed in: Red Hat OpenShift Container Platform 4.13 · released 2026-09-17 · [advisory](https://access.redhat.com/errata/RHSA-2026:65839)","depth":"twilight","depthScore":48,"depthScoreParts":{"impact":48.4,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}