{"id":"CVE-2023-54086","state":"PUBLISHED","title":"bpf: Add preempt_count_{sub,add} into btf id deny list","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Add preempt_count_{sub,add} into btf id deny list\n\nThe recursion check in __bpf_prog_enter* and __bpf_prog_exit*\nleave preempt_count_{sub,add} unprotected. When attaching trampoline to\nthem we get panic as follows,\n\n[  867.843050] BUG: TASK stack guard page was hit at 0000000009d325cf (stack is 0000000046a46a15..00000000537e7b28)\n[  867.843064] stack guard page: 0000 [#1] PREEMPT SMP NOPTI\n[  867.843067] CPU: 8 PID: 11009 Comm: trace Kdump: loaded Not tainted 6.2.0+ #4\n[  867.843100] Call Trace:\n[  867.843101]  <TASK>\n[  867.843104]  asm_exc_int3+0x3a/0x40\n[  867.843108] RIP: 0010:preempt_count_sub+0x1/0xa0\n[  867.843135]  __bpf_prog_enter_recur+0x17/0x90\n[  867.843148]  bpf_trampoline_6442468108_0+0x2e/0x1000\n[  867.843154]  ? preempt_count_sub+0x1/0xa0\n[  867.843157]  preempt_count_sub+0x5/0xa0\n[  867.843159]  ? migrate_enable+0xac/0xf0\n[  867.843164]  __bpf_prog_exit_recur+0x2d/0x40\n[  867.843168]  bpf_trampoline_6442468108_0+0x55/0x1000\n...\n[  867.843788]  preempt_count_sub+0x5/0xa0\n[  867.843793]  ? migrate_enable+0xac/0xf0\n[  867.843829]  __bpf_prog_exit_recur+0x2d/0x40\n[  867.843837] BUG: IRQ stack guard page was hit at 0000000099bd8228 (stack is 00000000b23e2bc4..000000006d95af35)\n[  867.843841] BUG: IRQ stack guard page was hit at 000000005ae07924 (stack is 00000000ffd69623..0000000014eb594c)\n[  867.843843] BUG: IRQ stack guard page was hit at 00000000028320f0 (stack is 00000000034b6438..0000000078d1bcec)\n[  867.843842]  bpf_trampoline_6442468108_0+0x55/0x1000\n...\n\nThat is because in __bpf_prog_exit_recur, the preempt_count_{sub,add} are\ncalled after prog->active is decreased.\n\nFixing this by adding these two functions into btf ids deny list.","publishedAt":"2025-12-24T13:06:16.857Z","updatedAt":"2026-05-23T15:32:32.011Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"35e3815fa8102fab4dee75f3547472c66581125d","status":"affected","lessThan":"095018267c87b8bfbbb12eeb1c0ebf2359e1782c","versionType":"git"},{"version":"35e3815fa8102fab4dee75f3547472c66581125d","status":"affected","lessThan":"60039bf72f81638baa28652a11a68e9b0b7b5b2d","versionType":"git"},{"version":"35e3815fa8102fab4dee75f3547472c66581125d","status":"affected","lessThan":"b9168d41b83d182f34ba927ee822edaee18d5fc8","versionType":"git"},{"version":"35e3815fa8102fab4dee75f3547472c66581125d","status":"affected","lessThan":"c11bd046485d7bf1ca200db0e7d0bdc4bafdd395","versionType":"git"},{"version":"f5e770c0c60ab8812574a2e0d163b0efa816a825","status":"affected","versionType":"git"},{"version":"5.12.11","status":"affected","lessThan":"5.13","versionType":"semver"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["kernel/bpf/verifier.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.13","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.13","versionType":"semver"},{"version":"5.15.113","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.30","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.3.4","status":"unaffected","lessThanOrEqual":"6.3.*","versionType":"semver"},{"version":"6.4","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["kernel/bpf/verifier.c"]}],"references":["https://git.kernel.org/stable/c/095018267c87b8bfbbb12eeb1c0ebf2359e1782c","https://git.kernel.org/stable/c/60039bf72f81638baa28652a11a68e9b0b7b5b2d","https://git.kernel.org/stable/c/b9168d41b83d182f34ba927ee822edaee18d5fc8","https://git.kernel.org/stable/c/c11bd046485d7bf1ca200db0e7d0bdc4bafdd395"],"weaknesses":[],"ingestedAt":"2026-10-29T20:06:42.242Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2023/54xxx/CVE-2023-54086.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2023-54086","state":"PUBLISHED","datePublished":"2025-12-24T13:06:16.857Z","dateUpdated":"2026-05-23T15:32:32.011Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2025-12-24T13:02:52.515Z"},"containers":{"cna":{"title":"bpf: Add preempt_count_{sub,add} into btf id deny list","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Add preempt_count_{sub,add} into btf id deny list\n\nThe recursion check in __bpf_prog_enter* and __bpf_prog_exit*\nleave preempt_count_{sub,add} unprotected. When attaching trampoline to\nthem we get panic as follows,\n\n[  867.843050] BUG: TASK stack guard page was hit at 0000000009d325cf (stack is 0000000046a46a15..00000000537e7b28)\n[  867.843064] stack guard page: 0000 [#1] PREEMPT SMP NOPTI\n[  867.843067] CPU: 8 PID: 11009 Comm: trace Kdump: loaded Not tainted 6.2.0+ #4\n[  867.843100] Call Trace:\n[  867.843101]  <TASK>\n[  867.843104]  asm_exc_int3+0x3a/0x40\n[  867.843108] RIP: 0010:preempt_count_sub+0x1/0xa0\n[  867.843135]  __bpf_prog_enter_recur+0x17/0x90\n[  867.843148]  bpf_trampoline_6442468108_0+0x2e/0x1000\n[  867.843154]  ? preempt_count_sub+0x1/0xa0\n[  867.843157]  preempt_count_sub+0x5/0xa0\n[  867.843159]  ? migrate_enable+0xac/0xf0\n[  867.843164]  __bpf_prog_exit_recur+0x2d/0x40\n[  867.843168]  bpf_trampoline_6442468108_0+0x55/0x1000\n...\n[  867.843788]  preempt_count_sub+0x5/0xa0\n[  867.843793]  ? migrate_enable+0xac/0xf0\n[  867.843829]  __bpf_prog_exit_recur+0x2d/0x40\n[  867.843837] BUG: IRQ stack guard page was hit at 0000000099bd8228 (stack is 00000000b23e2bc4..000000006d95af35)\n[  867.843841] BUG: IRQ stack guard page was hit at 000000005ae07924 (stack is 00000000ffd69623..0000000014eb594c)\n[  867.843843] BUG: IRQ stack guard page was hit at 00000000028320f0 (stack is 00000000034b6438..0000000078d1bcec)\n[  867.843842]  bpf_trampoline_6442468108_0+0x55/0x1000\n...\n\nThat is because in __bpf_prog_exit_recur, the preempt_count_{sub,add} are\ncalled after prog->active is decreased.\n\nFixing this by adding these two functions into btf ids deny list."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"35e3815fa8102fab4dee75f3547472c66581125d","status":"affected","lessThan":"095018267c87b8bfbbb12eeb1c0ebf2359e1782c","versionType":"git"},{"version":"35e3815fa8102fab4dee75f3547472c66581125d","status":"affected","lessThan":"60039bf72f81638baa28652a11a68e9b0b7b5b2d","versionType":"git"},{"version":"35e3815fa8102fab4dee75f3547472c66581125d","status":"affected","lessThan":"b9168d41b83d182f34ba927ee822edaee18d5fc8","versionType":"git"},{"version":"35e3815fa8102fab4dee75f3547472c66581125d","status":"affected","lessThan":"c11bd046485d7bf1ca200db0e7d0bdc4bafdd395","versionType":"git"},{"version":"f5e770c0c60ab8812574a2e0d163b0efa816a825","status":"affected","versionType":"git"},{"version":"5.12.11","status":"affected","lessThan":"5.13","versionType":"semver"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["kernel/bpf/verifier.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.13","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.13","versionType":"semver"},{"version":"5.15.113","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.30","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.3.4","status":"unaffected","lessThanOrEqual":"6.3.*","versionType":"semver"},{"version":"6.4","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["kernel/bpf/verifier.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/095018267c87b8bfbbb12eeb1c0ebf2359e1782c"},{"url":"https://git.kernel.org/stable/c/60039bf72f81638baa28652a11a68e9b0b7b5b2d"},{"url":"https://git.kernel.org/stable/c/b9168d41b83d182f34ba927ee822edaee18d5fc8"},{"url":"https://git.kernel.org/stable/c/c11bd046485d7bf1ca200db0e7d0bdc4bafdd395"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-23T15:32:32.011Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.13","versionEndExcluding":"5.15.113"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.13","versionEndExcluding":"6.1.30"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.13","versionEndExcluding":"6.3.4"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.13","versionEndExcluding":"6.4"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.12.11"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}