{"id":"CVE-2026-43114","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nft_set_pipapo_avx2: don't return non-matching entry on expiry\n\nNew test case fails unexpectedly when avx2 matching functions are used.\n\nThe test first loads…","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nft_set_pipapo_avx2: don't return non-matching entry on expiry\n\nNew test case fails unexpectedly when avx2 matching functions are used.\n\nThe test first loads…","severity":"critical","cvss":9.4,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L","cwe":["CWE-480"],"vendor":"linux","product":"linux_kernel","affected":["linux_kernel >= 5.7, < 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 = 7.0"],"patched":["linux_kernel 6.19.14"],"published":"2026-05-06","updated":"2026-09-16","sourceUpdated":"2026-09-16T13:17:57.820","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-43114","references":[{"url":"https://git.kernel.org/stable/c/07de44424bb7f17ef9357e8535df96d9e97c40cb","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/0abbc43f71d99baadeeba6fa3fe1c80b676f57ed","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/1c43f0dd8691ddf8884793b481ddc7511cf593c3","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/3d53f9aafd469ae1ea27051e00f5b96ca1b55d52","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/c7babe2f28b507e17f28e9f753b7caec72d4857f","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/d3c0037ffe1273fa1961e779ff6906234d6cf53c","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/f8c39983fc9c1a978c82e6f2df7bfba8a8561587","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/fa4f1f52528c73989d820f32bfca06bec5afeece","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://access.redhat.com/errata/RHSA-2026:59723","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:62568","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-2026:63093","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:64767","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:65712","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:66351","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:66370","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:66376","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:67721","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:67723","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/security/cve/CVE-2026-43114","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2466994","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-43114.json","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-43114"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-43114"},{"url":"https://lore.kernel.org/linux-cve-announce/2026050626-CVE-2026-43114-5deb@gregkh/T"}],"tags":["nvd","cve.org","csaf","vex","red-hat"],"epss":0.00669,"epssPercentile":0.49761,"scores":{"nvd":9.4,"vendor":8.1,"cna":9.4},"ingestedAt":"2026-08-26T16:46:31.688Z","slug":"CVE-2026-43114","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nft_set_pipapo_avx2: don't return non-matching entry on expiry\n\nNew test case fails unexpectedly when avx2 matching functions are used.\n\nThe test first loads a ranomly generated pipapo set\nwith 'ipv4 . port' key, i.e.  nft -f foo.\n\nThis works.  Then, it reloads the set after a flush:\n(echo flush set t s; cat foo) | nft -f -\n\nThis is expected to work, because its the same set after all and it was\nalready loaded once.\n\nBut with avx2, this fails: nft reports a clashing element.\n\nThe reported clash is of following form:\n\n    We successfully re-inserted\n      a . b\n      c . d\n\nThen we try to insert a . d\n\navx2 finds the already existing a . d, which (due to 'flush set') is marked\nas invalid in the new generation.  It skips the element and moves to next.\n\nDue to incorrect masking, the skip-step finds the next matching\nelement *only considering the first field*,\n\ni.e. we return the already reinserted \"a . b\", even though the\nlast field is different and the entry should not have been matched.\n\nNo such error is reported for the generic c implementation (no avx2) or when\nthe last field has to use the 'nft_pipapo_avx2_lookup_slow' fallback.\n\nBisection points to\n7711f4bb4b36 (\"netfilter: nft_set_pipapo: fix range overlap detection\")\nbut that fix merely uncovers this bug.\n\nBefore this commit, the wrong element is returned, but erronously\nreported as a full, identical duplicate.\n\nThe root-cause is too early return in the avx2 match functions.\nWhen we process the last field, we should continue to process data\nuntil the entire input size has been consumed to make sure no stale\nbits remain in the map.\n\n## Affected\n\n- `linux_kernel >= 5.7, < 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 = 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-2026:64767** · 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 2026-09-08 · [advisory](https://access.redhat.com/errata/RHSA-2026:64767)\n- **RHSA-2026:62568** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream EUS (v.9.6), Red Hat Enterprise Linux BaseOS EUS (v.9.6), Red Hat CodeReady Linux Builder EUS (v.9.6), Red Hat Enterprise Linux Real Time for NFV EUS (v.9.6), Red Hat Enterprise Linux Real Time EUS (v.9.6) · released 2026-09-02 · [advisory](https://access.redhat.com/errata/RHSA-2026:62568)\n- **RHSA-2026:59723** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 9), Red Hat Enterprise Linux BaseOS (v. 9), Red Hat Enterprise Linux CodeReady Linux Builder (v. 9), Red Hat Enterprise Linux Real Time for NFV (v. 9), Red Hat Enterprise Linux Real Time (v. 9) · released 2026-08-26 · [advisory](https://access.redhat.com/errata/RHSA-2026:59723)\n- **RHSA-2026:62642** · Red Hat · fixed in: Red Hat Enterprise Linux BaseOS (v. 10) · released 2026-09-02 · [advisory](https://access.redhat.com/errata/RHSA-2026:62642)\n- **RHSA-2026:62638** · Red Hat · fixed in: Red Hat Enterprise Linux BaseOS E4S (v.9.2) · released 2026-09-02 · [advisory](https://access.redhat.com/errata/RHSA-2026:62638)\n- **RHSA-2026:62639** · Red Hat · fixed in: Red Hat Enterprise Linux BaseOS E4S (v.9.4) · released 2026-09-02 · [advisory](https://access.redhat.com/errata/RHSA-2026:62639)\n- **RHSA-2026:62641** · Red Hat · fixed in: Red Hat Enterprise Linux BaseOS EUS (v.9.6) · released 2026-09-02 · [advisory](https://access.redhat.com/errata/RHSA-2026:62641)\n- **RHSA-2026:62640** · Red Hat · fixed in: Red Hat Enterprise Linux BaseOS (v. 9) · released 2026-09-02 · [advisory](https://access.redhat.com/errata/RHSA-2026:62640)\n- **Red Hat VEX** · Important · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9 · no fix planned: Red Hat Enterprise Linux 9, Red Hat Enterprise Linux 10 · updated 2026-09-16 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-43114.json)\n- **RHSA-2026:63093** · Red Hat · fixed in: Red Hat OpenShift Container Platform 4.22 · released 2026-09-08 · [advisory](https://access.redhat.com/errata/RHSA-2026:63093)\n- **RHSA-2026:65712** · 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 2026-09-09 · [advisory](https://access.redhat.com/errata/RHSA-2026:65712)\n- **RHSA-2026:66376** · Red Hat · fixed in: Red Hat OpenShift Container Platform 4.20 · released 2026-09-15 · [advisory](https://access.redhat.com/errata/RHSA-2026:66376)\n- **RHSA-2026:66351** · Red Hat · fixed in: Red Hat OpenShift Container Platform 4.21 · released 2026-09-15 · [advisory](https://access.redhat.com/errata/RHSA-2026:66351)\n- **RHSA-2026:66370** · Red Hat · fixed in: Red Hat OpenShift Container Platform 4.19 · released 2026-09-16 · [advisory](https://access.redhat.com/errata/RHSA-2026:66370)\n- **RHSA-2026:67723** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream E4S (v.9.2), Red Hat Enterprise Linux BaseOS E4S (v.9.2) · released 2026-09-16 · [advisory](https://access.redhat.com/errata/RHSA-2026:67723)","depth":"midnight","depthScore":52,"depthScoreParts":{"impact":51.7,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}