{"id":"DEBIAN-CVE-2023-54086","details":"In the Linux kernel, the following vulnerability has been resolved:  bpf: Add preempt_count_{sub,add} into btf id deny list  The recursion check in __bpf_prog_enter* and __bpf_prog_exit* leave preempt_count_{sub,add} unprotected. When attaching trampoline to them we get panic as follows,  [  867.843050] BUG: TASK stack guard page was hit at 0000000009d325cf (stack is 0000000046a46a15..00000000537e7b28) [  867.843064] stack guard page: 0000 [#1] PREEMPT SMP NOPTI [  867.843067] CPU: 8 PID: 11009 Comm: trace Kdump: loaded Not tainted 6.2.0+ #4 [  867.843100] Call Trace: [  867.843101]  \u003cTASK\u003e [  867.843104]  asm_exc_int3+0x3a/0x40 [  867.843108] RIP: 0010:preempt_count_sub+0x1/0xa0 [  867.843135]  __bpf_prog_enter_recur+0x17/0x90 [  867.843148]  bpf_trampoline_6442468108_0+0x2e/0x1000 [  867.843154]  ? preempt_count_sub+0x1/0xa0 [  867.843157]  preempt_count_sub+0x5/0xa0 [  867.843159]  ? migrate_enable+0xac/0xf0 [  867.843164]  __bpf_prog_exit_recur+0x2d/0x40 [  867.843168]  bpf_trampoline_6442468108_0+0x55/0x1000 ... [  867.843788]  preempt_count_sub+0x5/0xa0 [  867.843793]  ? migrate_enable+0xac/0xf0 [  867.843829]  __bpf_prog_exit_recur+0x2d/0x40 [  867.843837] BUG: IRQ stack guard page was hit at 0000000099bd8228 (stack is 00000000b23e2bc4..000000006d95af35) [  867.843841] BUG: IRQ stack guard page was hit at 000000005ae07924 (stack is 00000000ffd69623..0000000014eb594c) [  867.843843] BUG: IRQ stack guard page was hit at 00000000028320f0 (stack is 00000000034b6438..0000000078d1bcec) [  867.843842]  bpf_trampoline_6442468108_0+0x55/0x1000 ...  That is because in __bpf_prog_exit_recur, the preempt_count_{sub,add} are called after prog-\u003eactive is decreased.  Fixing this by adding these two functions into btf ids deny list.","modified":"2026-09-15T08:47:27.709300480Z","published":"2025-12-24T13:16:10.453Z","upstream":["CVE-2023-54086"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2023-54086"}],"affected":[{"package":{"name":"linux","ecosystem":"Debian:12","purl":"pkg:deb/debian/linux?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.1.37-1"}]}],"versions":["6.1.27-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2023-54086.json"}},{"package":{"name":"linux","ecosystem":"Debian:13","purl":"pkg:deb/debian/linux?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.3.7-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2023-54086.json"}},{"package":{"name":"linux","ecosystem":"Debian:14","purl":"pkg:deb/debian/linux?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.3.7-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2023-54086.json"}}],"schema_version":"1.9.0"}