{"id":"CVE-2026-68144","state":"PUBLISHED","title":"phonet: pep: fix use-after-free in pep_get_sb()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nphonet: pep: fix use-after-free in pep_get_sb()\n\npep_get_sb() doesn't consider that pskb_may_pull() might have relocated\nthe skb data, and continue to access the older pointer, causing UAF.\n\nReproduced under KASAN:\n\n  BUG: KASAN: slab-use-after-free in pep_get_sb+0x234/0x3b0\n  Read of size 1 at addr ff11000105510f50 by task repro/157\n   pep_get_sb+0x234/0x3b0\n   pipe_handler_do_rcv+0x5f7/0xa10\n   pep_do_rcv+0x203/0x410\n   __sk_receive_skb+0x471/0x4a0\n   phonet_rcv+0x5b3/0x6c0\n   __netif_receive_skb+0xcc/0x1d0\n\nRefetch the header with skb_header_pointer() after pskb_may_pull(), so\nthe possibly stale pointer is no longer dereferenced. There are better\nways to solve this, but, this is the less instrusive one.","publishedAt":"2026-08-10T11:59:08.437Z","updatedAt":"2026-10-19T20:58:53.730Z","severity":{"score":9.8,"label":"Critical","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","source":"Linux"},"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"9641458d3ec42def729fde64669abf07f3220cd5","status":"affected","lessThan":"c4a52cb4da8d57d060b1d52085d25147a238dac2","versionType":"git"},{"version":"9641458d3ec42def729fde64669abf07f3220cd5","status":"affected","lessThan":"df198743859fefba2f824115f8151dd62d7ad6d8","versionType":"git"},{"version":"9641458d3ec42def729fde64669abf07f3220cd5","status":"affected","lessThan":"1d81e19fc57a5ee55b4497d01bc0510d76fb9578","versionType":"git"},{"version":"9641458d3ec42def729fde64669abf07f3220cd5","status":"affected","lessThan":"8d931a75a38b9bb584a4071f5ebbd52755fc35ee","versionType":"git"},{"version":"9641458d3ec42def729fde64669abf07f3220cd5","status":"affected","lessThan":"17f78c0c0d41d738ee236eb6e841e39395188054","versionType":"git"},{"version":"9641458d3ec42def729fde64669abf07f3220cd5","status":"affected","lessThan":"a48a889b60f73edb0399a8b08284a2ab0bd0295f","versionType":"git"},{"version":"9641458d3ec42def729fde64669abf07f3220cd5","status":"affected","lessThan":"25e3641beb51333bfbb155af2fd2573a61113af2","versionType":"git"},{"version":"9641458d3ec42def729fde64669abf07f3220cd5","status":"affected","lessThan":"0f71f852a96af9685858ce59fda34ecbf85c283d","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/phonet/pep.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"2.6.28","status":"affected"},{"version":"0","status":"unaffected","lessThan":"2.6.28","versionType":"semver"},{"version":"5.10.265","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.216","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.183","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.148","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.101","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.42","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.6","status":"unaffected","lessThanOrEqual":"7.1.*","versionType":"semver"},{"version":"7.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/phonet/pep.c"]}],"references":["https://git.kernel.org/stable/c/c4a52cb4da8d57d060b1d52085d25147a238dac2","https://git.kernel.org/stable/c/df198743859fefba2f824115f8151dd62d7ad6d8","https://git.kernel.org/stable/c/1d81e19fc57a5ee55b4497d01bc0510d76fb9578","https://git.kernel.org/stable/c/8d931a75a38b9bb584a4071f5ebbd52755fc35ee","https://git.kernel.org/stable/c/17f78c0c0d41d738ee236eb6e841e39395188054","https://git.kernel.org/stable/c/a48a889b60f73edb0399a8b08284a2ab0bd0295f","https://git.kernel.org/stable/c/25e3641beb51333bfbb155af2fd2573a61113af2","https://git.kernel.org/stable/c/0f71f852a96af9685858ce59fda34ecbf85c283d"],"weaknesses":["CWE-416"],"ingestedAt":"2026-10-29T20:12:49.727Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/68xxx/CVE-2026-68144.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-68144","state":"PUBLISHED","datePublished":"2026-08-10T11:59:08.437Z","dateUpdated":"2026-10-19T20:58:53.730Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-07-30T09:28:09.370Z"},"containers":{"cna":{"title":"phonet: pep: fix use-after-free in pep_get_sb()","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nphonet: pep: fix use-after-free in pep_get_sb()\n\npep_get_sb() doesn't consider that pskb_may_pull() might have relocated\nthe skb data, and continue to access the older pointer, causing UAF.\n\nReproduced under KASAN:\n\n  BUG: KASAN: slab-use-after-free in pep_get_sb+0x234/0x3b0\n  Read of size 1 at addr ff11000105510f50 by task repro/157\n   pep_get_sb+0x234/0x3b0\n   pipe_handler_do_rcv+0x5f7/0xa10\n   pep_do_rcv+0x203/0x410\n   __sk_receive_skb+0x471/0x4a0\n   phonet_rcv+0x5b3/0x6c0\n   __netif_receive_skb+0xcc/0x1d0\n\nRefetch the header with skb_header_pointer() after pskb_may_pull(), so\nthe possibly stale pointer is no longer dereferenced. There are better\nways to solve this, but, this is the less instrusive one."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"9641458d3ec42def729fde64669abf07f3220cd5","status":"affected","lessThan":"c4a52cb4da8d57d060b1d52085d25147a238dac2","versionType":"git"},{"version":"9641458d3ec42def729fde64669abf07f3220cd5","status":"affected","lessThan":"df198743859fefba2f824115f8151dd62d7ad6d8","versionType":"git"},{"version":"9641458d3ec42def729fde64669abf07f3220cd5","status":"affected","lessThan":"1d81e19fc57a5ee55b4497d01bc0510d76fb9578","versionType":"git"},{"version":"9641458d3ec42def729fde64669abf07f3220cd5","status":"affected","lessThan":"8d931a75a38b9bb584a4071f5ebbd52755fc35ee","versionType":"git"},{"version":"9641458d3ec42def729fde64669abf07f3220cd5","status":"affected","lessThan":"17f78c0c0d41d738ee236eb6e841e39395188054","versionType":"git"},{"version":"9641458d3ec42def729fde64669abf07f3220cd5","status":"affected","lessThan":"a48a889b60f73edb0399a8b08284a2ab0bd0295f","versionType":"git"},{"version":"9641458d3ec42def729fde64669abf07f3220cd5","status":"affected","lessThan":"25e3641beb51333bfbb155af2fd2573a61113af2","versionType":"git"},{"version":"9641458d3ec42def729fde64669abf07f3220cd5","status":"affected","lessThan":"0f71f852a96af9685858ce59fda34ecbf85c283d","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/phonet/pep.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"2.6.28","status":"affected"},{"version":"0","status":"unaffected","lessThan":"2.6.28","versionType":"semver"},{"version":"5.10.265","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.216","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.183","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.148","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.101","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.42","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.6","status":"unaffected","lessThanOrEqual":"7.1.*","versionType":"semver"},{"version":"7.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/phonet/pep.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/c4a52cb4da8d57d060b1d52085d25147a238dac2"},{"url":"https://git.kernel.org/stable/c/df198743859fefba2f824115f8151dd62d7ad6d8"},{"url":"https://git.kernel.org/stable/c/1d81e19fc57a5ee55b4497d01bc0510d76fb9578"},{"url":"https://git.kernel.org/stable/c/8d931a75a38b9bb584a4071f5ebbd52755fc35ee"},{"url":"https://git.kernel.org/stable/c/17f78c0c0d41d738ee236eb6e841e39395188054"},{"url":"https://git.kernel.org/stable/c/a48a889b60f73edb0399a8b08284a2ab0bd0295f"},{"url":"https://git.kernel.org/stable/c/25e3641beb51333bfbb155af2fd2573a61113af2"},{"url":"https://git.kernel.org/stable/c/0f71f852a96af9685858ce59fda34ecbf85c283d"}],"metrics":[{"cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","baseScore":9.8,"baseSeverity":"CRITICAL"},"scenarios":[{"lang":"en","value":"AV:N - The bug is hit in phonet_rcv() via __netif_receive_skb() when processing inbound Phonet pipe packets on a netdev; on modem-equipped phones this path is reachable from the cellular/BT-facing modem link without local access.\nAC:L - The attacker fully controls crafted TLV sb_len values in Phonet pipe messages to deterministically force pskb_may_pull() skb head reallocation; no race or victim-specific state beyond an existing/connecting pipe socket is required.\nPR:N - Exploitation requires only delivering a malformed Phonet packet to a listening/connecting pipe endpoint; phonet_rcv() performs no authentication or capability checks before delivering to pep_do_rcv() and pep_get_sb().\nUI:N - No end-user action is needed; triggering only requires a background phonet pipe listener or an in-progress connect/accept on affected Nokia/modem platforms where phonet daemons run continuously.\nS:U - Impact is confined to kernel memory/process integrity on the affected host; successful exploitation yields local privilege escalation within the same kernel security domain, not a cross-VM or cross-container boundary escape.\nC:H - Confirmed slab use-after-free read in pep_get_sb(); stale post-realloc pointer dereference can leak adjacent heap contents and is a standard primitive for arbitrary kernel memory disclosure.\nI:H - Use-after-free on skb header memory enables heap grooming and control of freed object contents, providing a well-established path to arbitrary kernel writes and code execution beyond the immediate one-byte read.\nA:H - KASAN reproduced a slab use-after-free oops in pep_get_sb() during packet receive; even without full exploit development, malformed Phonet pipe packets can reliably panic or hang the kernel on affected systems."}]}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-08-19T16:30:06.882Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.28","versionEndExcluding":"5.10.265"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.28","versionEndExcluding":"5.15.216"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.28","versionEndExcluding":"6.1.183"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.28","versionEndExcluding":"6.6.148"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.28","versionEndExcluding":"6.12.101"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.28","versionEndExcluding":"6.18.42"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.28","versionEndExcluding":"7.1.6"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.28","versionEndExcluding":"7.2"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2026-68144","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"total"}],"version":"2.0.3","timestamp":"2026-10-16T15:44:46.818096Z"}}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-416","lang":"en","type":"CWE","description":"CWE-416 Use After Free"}]}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-10-19T20:58:53.730Z"}}]}}}