{"id":"CVE-2026-52932","state":"PUBLISHED","title":"xfrm: ipcomp: Free destination pages on acomp errors","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nxfrm: ipcomp: Free destination pages on acomp errors\n\nMove the out_free_req label up by a couple of lines so that the\nallocated dst SG list gets freed on error as well as success.","publishedAt":"2026-06-24T07:14:24.002Z","updatedAt":"2026-08-05T12:31:50.048Z","severity":{"score":7.5,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","source":"Linux"},"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"eb2953d26971f3083bbf95de4bc997b5bedf0b6e","status":"affected","lessThan":"dc6dcba80d72a27ab61831ad3d253316e0c9b9d5","versionType":"git"},{"version":"eb2953d26971f3083bbf95de4bc997b5bedf0b6e","status":"affected","lessThan":"b30aa173c3809f6af4c83a86099be1be19aa48eb","versionType":"git"},{"version":"eb2953d26971f3083bbf95de4bc997b5bedf0b6e","status":"affected","lessThan":"7dbac7680eb629b3b4dc7e98c34f943b8814c0c8","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/xfrm/xfrm_ipcomp.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.15","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.15","versionType":"semver"},{"version":"6.18.35","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.0.12","status":"unaffected","lessThanOrEqual":"7.0.*","versionType":"semver"},{"version":"7.1","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/xfrm/xfrm_ipcomp.c"]}],"references":["https://git.kernel.org/stable/c/dc6dcba80d72a27ab61831ad3d253316e0c9b9d5","https://git.kernel.org/stable/c/b30aa173c3809f6af4c83a86099be1be19aa48eb","https://git.kernel.org/stable/c/7dbac7680eb629b3b4dc7e98c34f943b8814c0c8"],"weaknesses":[],"ingestedAt":"2026-10-29T20:12:16.098Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/52xxx/CVE-2026-52932.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-52932","state":"PUBLISHED","datePublished":"2026-06-24T07:14:24.002Z","dateUpdated":"2026-08-05T12:31:50.048Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-06-09T07:44:35.369Z"},"containers":{"cna":{"title":"xfrm: ipcomp: Free destination pages on acomp errors","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nxfrm: ipcomp: Free destination pages on acomp errors\n\nMove the out_free_req label up by a couple of lines so that the\nallocated dst SG list gets freed on error as well as success."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"eb2953d26971f3083bbf95de4bc997b5bedf0b6e","status":"affected","lessThan":"dc6dcba80d72a27ab61831ad3d253316e0c9b9d5","versionType":"git"},{"version":"eb2953d26971f3083bbf95de4bc997b5bedf0b6e","status":"affected","lessThan":"b30aa173c3809f6af4c83a86099be1be19aa48eb","versionType":"git"},{"version":"eb2953d26971f3083bbf95de4bc997b5bedf0b6e","status":"affected","lessThan":"7dbac7680eb629b3b4dc7e98c34f943b8814c0c8","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/xfrm/xfrm_ipcomp.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.15","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.15","versionType":"semver"},{"version":"6.18.35","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.0.12","status":"unaffected","lessThanOrEqual":"7.0.*","versionType":"semver"},{"version":"7.1","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/xfrm/xfrm_ipcomp.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/dc6dcba80d72a27ab61831ad3d253316e0c9b9d5"},{"url":"https://git.kernel.org/stable/c/b30aa173c3809f6af4c83a86099be1be19aa48eb"},{"url":"https://git.kernel.org/stable/c/7dbac7680eb629b3b4dc7e98c34f943b8814c0c8"}],"metrics":[{"cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","baseScore":7.5,"baseSeverity":"HIGH"},"scenarios":[{"lang":"en","value":"AV:N - Inbound IPComp packets are handled by the IPv4/IPv6 protocol handlers and dispatched through xfrm_input() to ipcomp_input() when they match an installed IPComp SA. A remote peer can send malformed IPComp payloads to a reasonably deployed IPsec/IPComp endpoint.\nAC:L - The attacker only needs to send packets with invalid or oversized compressed data that make crypto_acomp_decompress() return an error after destination pages are allocated. There is no race or memory-layout prerequisite beyond reaching a configured IPComp SA.\nPR:N - On the remote receive path, no local privileges or authenticated user account are required; packets are processed before any per-user credential check. SA configuration is a deployment precondition, not an attacker privilege.\nUI:N - No victim user action is required after the target is running with an inbound IPComp SA. The attacker can repeatedly trigger the error path by sending network packets.\nS:U - The vulnerability consumes kernel memory within the same operating-system security authority. It does not cross a VM, hypervisor, IOMMU, or separate security-scope boundary.\nC:N - The bug leaks caller-allocated destination pages on the error path but does not expose their contents to the attacker. No arbitrary read or information disclosure primitive was found.\nI:N - The missed cleanup is a memory/resource leak, not a use-after-free, out-of-bounds write, or control-flow corruption. It does not provide a data modification primitive.\nA:H - Each failed IPComp decompression can leak multiple kernel pages, and a remote attacker can repeat this to exhaust kernel memory and cause system-wide denial of service. Under the required higher-severity rule, this is scored as high availability impact."}]}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-08-05T12:31:50.048Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.15","versionEndExcluding":"6.18.35"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.15","versionEndExcluding":"7.0.12"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.15","versionEndExcluding":"7.1"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}