{ "schemaVersion": 1, "attribution": [ { "source": "CISA Known Exploited Vulnerabilities", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog", "licence": "US government work" }, { "source": "GitHub Advisory Database", "url": "https://github.com/advisories", "licence": "CC BY 4.0" }, { "source": "Have I Been Pwned", "url": "https://haveibeenpwned.com/", "licence": "CC BY 4.0" }, { "source": "CVE Program (CVE records)", "url": "https://www.cve.org/Legal/TermsOfUse", "licence": "CVE Terms of Use", "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.", "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy." }, { "source": "FIRST EPSS", "url": "https://www.first.org/epss/", "licence": "free to use; FIRST requests attribution" } ], "record": { "id": "CVE-2025-38165", "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2025-38165", "idYear": 2025, "status": "PUBLISHED", "publishedAt": "2025-07-03T08:36:05.738Z", "updatedAt": "2026-08-05T11:59:58.694Z", "importedAt": "2026-10-24T01:57:34.152Z", "snapshot": { "id": "cve_2026-10-24_midnight_baseline", "at": "2026-10-24T00:00:00.000Z", "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z" }, "facts": { "title": "bpf, sockmap: Fix panic when calling skb_linearize", "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf, sockmap: Fix panic when calling skb_linearize\n\nThe panic can be reproduced by executing the command:\n./bench sockmap -c 2 -p 1 -a --rx-verdict-ingress --rx-strp 100000\n\nThen a kernel panic was captured:\n'''\n[ 657.460555] kernel BUG at net/core/skbuff.c:2178!\n[ 657.462680] Tainted: [W]=WARN\n[ 657.463287] Workqueue: events sk_psock_backlog\n...\n[ 657.469610] \n[ 657.469738] ? die+0x36/0x90\n[ 657.469916] ? do_trap+0x1d0/0x270\n[ 657.470118] ? pskb_expand_head+0x612/0xf40\n[ 657.470376] ? pskb_expand_head+0x612/0xf40\n[ 657.470620] ? do_error_trap+0xa3/0x170\n[ 657.470846] ? pskb_expand_head+0x612/0xf40\n[ 657.471092] ? handle_invalid_op+0x2c/0x40\n[ 657.471335] ? pskb_expand_head+0x612/0xf40\n[ 657.471579] ? exc_invalid_op+0x2d/0x40\n[ 657.471805] ? asm_exc_invalid_op+0x1a/0x20\n[ 657.472052] ? pskb_expand_head+0xd1/0xf40\n[ 657.472292] ? pskb_expand_head+0x612/0xf40\n[ 657.472540] ? lock_acquire+0x18f/0x4e0\n[ 657.472766] ? find_held_lock+0x2d/0x110\n[ 657.472999] ? __pfx_pskb_expand_head+0x10/0x10\n[ 657.473263] ? __kmalloc_cache_noprof+0x5b/0x470\n[ 657.473537] ? __pfx___lock_release.isra.0+0x10/0x10\n[ 657.473826] __pskb_pull_tail+0xfd/0x1d20\n[ 657.474062] ? __kasan_slab_alloc+0x4e/0x90\n[ 657.474707] sk_psock_skb_ingress_enqueue+0x3bf/0x510\n[ 657.475392] ? __kasan_kmalloc+0xaa/0xb0\n[ 657.476010] sk_psock_backlog+0x5cf/0xd70\n[ 657.476637] process_one_work+0x858/0x1a20\n'''\n\nThe panic originates from the assertion BUG_ON(skb_shared(skb)) in\nskb_linearize(). A previous commit(see Fixes tag) introduced skb_get()\nto avoid race conditions between skb operations in the backlog and skb\nrelease in the recvmsg path. However, this caused the panic to always\noccur when skb_linearize is executed.\n\nThe \"--rx-strp 100000\" parameter forces the RX path to use the strparser\nmodule which aggregates data until it reaches 100KB before calling sockmap\nlogic. The 100KB payload exceeds MAX_MSG_FRAGS, triggering skb_linearize.\n\nTo fix this issue, just move skb_get into sk_psock_skb_ingress_enqueue.\n\n'''\nsk_psock_backlog:\n sk_psock_handle_skb\n skb_get(skb) <== we move it into 'sk_psock_skb_ingress_enqueue'\n sk_psock_skb_ingress____________\n ↓\n |\n | → sk_psock_skb_ingress_self\n | sk_psock_skb_ingress_enqueue\nsk_psock_verdict_apply_________________↑ skb_linearize\n'''\n\nNote that for verdict_apply path, the skb_get operation is unnecessary so\nwe add 'take_ref' param to control it's behavior.", "affected": [ { "vendor": "Linux", "product": "Linux", "defaultStatus": "unaffected", "versions": [ { "version": "65ad600b9bde68d2d28709943ab00b51ca8f0a1d", "status": "affected", "versionType": "git", "lessThan": "4dba44333a11522df54b49aa1f2edfaf6ce35fc7" }, { "version": "923877254f002ae87d441382bb1096d9e773d56d", "status": "affected", "versionType": "git", "lessThan": "9718ba6490732dbe70190d42c21deb1440834402" }, { "version": "a454d84ee20baf7bd7be90721b9821f73c7d23d9", "status": "affected", "versionType": "git", "lessThan": "db1d15a26f21f97459508c42ae87cabe8d3afc3b" }, { "version": "a454d84ee20baf7bd7be90721b9821f73c7d23d9", "status": "affected", "versionType": "git", "lessThan": "3d25fa2d7f127348c818e1dab9e58534f7ac56cc" }, { "version": "a454d84ee20baf7bd7be90721b9821f73c7d23d9", "status": "affected", "versionType": "git", "lessThan": "e9c1299d813fc04668042690f2c3cc76d013959a" }, { "version": "a454d84ee20baf7bd7be90721b9821f73c7d23d9", "status": "affected", "versionType": "git", "lessThan": "5ca2e29f6834c64c0e5a9ccf1278c21fb49b827e" }, { "version": "e6b5e47adb9166e732cdf7e6e034946e3f89f36d", "status": "affected", "versionType": "git" }, { "version": "5.15.189", "status": "affected", "versionType": "semver", "lessThan": "5.15.190" }, { "version": "6.1.54", "status": "affected", "versionType": "semver", "lessThan": "6.1.142" }, { "version": "6.5.4", "status": "affected", "versionType": "semver", "lessThan": "6.6" } ] }, { "vendor": "Linux", "product": "Linux", "defaultStatus": "affected", "versions": [ { "version": "6.6", "status": "affected" }, { "version": "0", "status": "unaffected", "versionType": "semver", "lessThan": "6.6" }, { "version": "5.15.190", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.15.*" }, { "version": "6.1.142", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.1.*" }, { "version": "6.6.94", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.6.*" }, { "version": "6.12.34", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.12.*" }, { "version": "6.15.3", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.15.*" }, { "version": "6.16", "status": "unaffected", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*" } ] } ] } } }