{"id":"CVE-2026-98791","state":"PUBLISHED","title":"net/mlx5e: Fix AF_XDP TX timestamp teardown NULL dereference","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet/mlx5e: Fix AF_XDP TX timestamp teardown NULL dereference\n\nDuring XSK TX queue teardown, outstanding descriptors are completed\nwithout a CQE. If one requested a TX timestamp, the completion path\npasses that NULL CQE to mlx5e_xsk_fill_timestamp(), which dereferences\nit.\n\nReturn zero when no CQE is available, indicating that teardown did not\nproduce a TX timestamp.","publishedAt":"2026-10-18T15:48:30.080Z","updatedAt":"2026-10-19T09:25:44.148Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"ec706a860eba99bf934d59f74b5db90af44e882e","status":"affected","lessThan":"fce70b6bf9f3261e887419a4e7caa25b80fa9d55","versionType":"git"},{"version":"ec706a860eba99bf934d59f74b5db90af44e882e","status":"affected","lessThan":"f81d40e2eb69552334f510114f3e6edd0d43178b","versionType":"git"},{"version":"ec706a860eba99bf934d59f74b5db90af44e882e","status":"affected","lessThan":"63df0ef4c6e3105589e6bb2e758ce611b0ada86c","versionType":"git"},{"version":"ec706a860eba99bf934d59f74b5db90af44e882e","status":"affected","lessThan":"7b97273cbebe9dd4fddc457f0c4f2a124d0e3996","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/ethernet/mellanox/mlx5/core/en/xdp.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.8","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.8","versionType":"semver"},{"version":"6.12.113","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.56","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.10","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/ethernet/mellanox/mlx5/core/en/xdp.c"]}],"references":["https://git.kernel.org/stable/c/fce70b6bf9f3261e887419a4e7caa25b80fa9d55","https://git.kernel.org/stable/c/f81d40e2eb69552334f510114f3e6edd0d43178b","https://git.kernel.org/stable/c/63df0ef4c6e3105589e6bb2e758ce611b0ada86c","https://git.kernel.org/stable/c/7b97273cbebe9dd4fddc457f0c4f2a124d0e3996"],"weaknesses":[],"ingestedAt":"2026-10-29T20:13:43.249Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/98xxx/CVE-2026-98791.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-98791","state":"PUBLISHED","datePublished":"2026-10-18T15:48:30.080Z","dateUpdated":"2026-10-19T09:25:44.148Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-09-25T10:25:14.370Z"},"containers":{"cna":{"title":"net/mlx5e: Fix AF_XDP TX timestamp teardown NULL dereference","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet/mlx5e: Fix AF_XDP TX timestamp teardown NULL dereference\n\nDuring XSK TX queue teardown, outstanding descriptors are completed\nwithout a CQE. If one requested a TX timestamp, the completion path\npasses that NULL CQE to mlx5e_xsk_fill_timestamp(), which dereferences\nit.\n\nReturn zero when no CQE is available, indicating that teardown did not\nproduce a TX timestamp."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"ec706a860eba99bf934d59f74b5db90af44e882e","status":"affected","lessThan":"fce70b6bf9f3261e887419a4e7caa25b80fa9d55","versionType":"git"},{"version":"ec706a860eba99bf934d59f74b5db90af44e882e","status":"affected","lessThan":"f81d40e2eb69552334f510114f3e6edd0d43178b","versionType":"git"},{"version":"ec706a860eba99bf934d59f74b5db90af44e882e","status":"affected","lessThan":"63df0ef4c6e3105589e6bb2e758ce611b0ada86c","versionType":"git"},{"version":"ec706a860eba99bf934d59f74b5db90af44e882e","status":"affected","lessThan":"7b97273cbebe9dd4fddc457f0c4f2a124d0e3996","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/ethernet/mellanox/mlx5/core/en/xdp.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.8","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.8","versionType":"semver"},{"version":"6.12.113","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.56","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.10","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/ethernet/mellanox/mlx5/core/en/xdp.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/fce70b6bf9f3261e887419a4e7caa25b80fa9d55"},{"url":"https://git.kernel.org/stable/c/f81d40e2eb69552334f510114f3e6edd0d43178b"},{"url":"https://git.kernel.org/stable/c/63df0ef4c6e3105589e6bb2e758ce611b0ada86c"},{"url":"https://git.kernel.org/stable/c/7b97273cbebe9dd4fddc457f0c4f2a124d0e3996"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-19T09:25:44.148Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.8","versionEndExcluding":"6.12.113"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.8","versionEndExcluding":"6.18.56"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.8","versionEndExcluding":"7.2.10"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.8","versionEndExcluding":"7.3"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}