{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2025-38279", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-04-16T04:51:23.998Z", "datePublished": "2025-07-10T07:41:58.184Z", "dateUpdated": "2026-05-23T15:59:20.262Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-23T15:59:20.262Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Do not include stack ptr register in precision backtracking bookkeeping\n\nYi Lai reported an issue ([1]) where the following warning appears\nin kernel dmesg:\n [ 60.643604] verifier backtracking bug\n [ 60.643635] WARNING: CPU: 10 PID: 2315 at kernel/bpf/verifier.c:4302 __mark_chain_precision+0x3a6c/0x3e10\n [ 60.648428] Modules linked in: bpf_testmod(OE)\n [ 60.650471] CPU: 10 UID: 0 PID: 2315 Comm: test_progs Tainted: G OE 6.15.0-rc4-gef11287f8289-dirty #327 PREEMPT(full)\n [ 60.654385] Tainted: [O]=OOT_MODULE, [E]=UNSIGNED_MODULE\n [ 60.656682] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014\n [ 60.660475] RIP: 0010:__mark_chain_precision+0x3a6c/0x3e10\n [ 60.662814] Code: 5a 30 84 89 ea e8 c4 d9 01 00 80 3d 3e 7d d8 04 00 0f 85 60 fa ff ff c6 05 31 7d d8 04\n 01 48 c7 c7 00 58 30 84 e8 c4 06 a5 ff <0f> 0b e9 46 fa ff ff 48 ...\n [ 60.668720] RSP: 0018:ffff888116cc7298 EFLAGS: 00010246\n [ 60.671075] RAX: 54d70e82dfd31900 RBX: ffff888115b65e20 RCX: 0000000000000000\n [ 60.673659] RDX: 0000000000000001 RSI: 0000000000000004 RDI: 00000000ffffffff\n [ 60.676241] RBP: 0000000000000400 R08: ffff8881f6f23bd3 R09: 1ffff1103ede477a\n [ 60.678787] R10: dffffc0000000000 R11: ffffed103ede477b R12: ffff888115b60ae8\n [ 60.681420] R13: 1ffff11022b6cbc4 R14: 00000000fffffff2 R15: 0000000000000001\n [ 60.684030] FS: 00007fc2aedd80c0(0000) GS:ffff88826fa8a000(0000) knlGS:0000000000000000\n [ 60.686837] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n [ 60.689027] CR2: 000056325369e000 CR3: 000000011088b002 CR4: 0000000000370ef0\n [ 60.691623] Call Trace:\n [ 60.692821] \n [ 60.693960] ? __pfx_verbose+0x10/0x10\n [ 60.695656] ? __pfx_disasm_kfunc_name+0x10/0x10\n [ 60.697495] check_cond_jmp_op+0x16f7/0x39b0\n [ 60.699237] do_check+0x58fa/0xab10\n ...\n\nFurther analysis shows the warning is at line 4302 as below:\n\n 4294 /* static subprog call instruction, which\n 4295 * means that we are exiting current subprog,\n 4296 * so only r1-r5 could be still requested as\n 4297 * precise, r0 and r6-r10 or any stack slot in\n 4298 * the current frame should be zero by now\n 4299 */\n 4300 if (bt_reg_mask(bt) & ~BPF_REGMASK_ARGS) {\n 4301 verbose(env, \"BUG regs %x\\n\", bt_reg_mask(bt));\n 4302 WARN_ONCE(1, \"verifier backtracking bug\");\n 4303 return -EFAULT;\n 4304 }\n\nWith the below test (also in the next patch):\n __used __naked static void __bpf_jmp_r10(void)\n {\n\tasm volatile (\n\t\"r2 = 2314885393468386424 ll;\"\n\t\"goto +0;\"\n\t\"if r2 <= r10 goto +3;\"\n\t\"if r1 >= -1835016 goto +0;\"\n\t\"if r2 <= 8 goto +0;\"\n\t\"if r3 <= 0 goto +0;\"\n\t\"exit;\"\n\t::: __clobber_all);\n }\n\n SEC(\"?raw_tp\")\n __naked void bpf_jmp_r10(void)\n {\n\tasm volatile (\n\t\"r3 = 0 ll;\"\n\t\"call __bpf_jmp_r10;\"\n\t\"r0 = 0;\"\n\t\"exit;\"\n\t::: __clobber_all);\n }\n\nThe following is the verifier failure log:\n 0: (18) r3 = 0x0 ; R3_w=0\n 2: (85) call pc+2\n caller:\n R10=fp0\n callee:\n frame1: R1=ctx() R3_w=0 R10=fp0\n 5: frame1: R1=ctx() R3_w=0 R10=fp0\n ; asm volatile (\" \\ @ verifier_precision.c:184\n 5: (18) r2 = 0x20202000256c6c78 ; frame1: R2_w=0x20202000256c6c78\n 7: (05) goto pc+0\n 8: (bd) if r2 <= r10 goto pc+3 ; frame1: R2_w=0x20202000256c6c78 R10=fp0\n 9: (35) if r1 >= 0xffe3fff8 goto pc+0 ; frame1: R1=ctx()\n 10: (b5) if r2 <= 0x8 goto pc+0\n mark_precise: frame1: last_idx 10 first_idx 0 subseq_idx -1\n mark_precise: frame1: regs=r2 stack= before 9: (35) if r1 >= 0xffe3fff8 goto pc+0\n mark_precise: frame1: regs=r2 stack= before 8: (bd) if r2 <= r10 goto pc+3\n mark_preci\n---truncated---" } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "include/linux/bpf_verifier.h", "kernel/bpf/verifier.c" ], "versions": [ { "version": "407958a0e980b9e1842ab87b5a1040521e1e24e9", "lessThan": "4265682c29c92f52c0da6fad5a79b5801462c8de", "status": "affected", "versionType": "git" }, { "version": "407958a0e980b9e1842ab87b5a1040521e1e24e9", "lessThan": "ac49b7560b4b08b1e4043a29214cc7ad77644c00", "status": "affected", "versionType": "git" }, { "version": "407958a0e980b9e1842ab87b5a1040521e1e24e9", "lessThan": "e2d2115e56c4a02377189bfc3a9a7933552a7b0f", "status": "affected", "versionType": "git" }, { "version": "fc2778c42f99c7de52fc004157b3c3ee4dcc208a", "status": "affected", "versionType": "git" }, { "version": "6.4.4", "lessThan": "6.5", "status": "affected", "versionType": "semver" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "include/linux/bpf_verifier.h", "kernel/bpf/verifier.c" ], "versions": [ { "version": "6.5", "status": "affected" }, { "version": "0", "lessThan": "6.5", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.37", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.15.3", "lessThanOrEqual": "6.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.16", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix" } ] } ], "cpeApplicability": [ { "nodes": [ { "operator": "OR", "negate": false, "cpeMatch": [ { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.5", "versionEndExcluding": "6.12.37" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.5", "versionEndExcluding": "6.15.3" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.5", "versionEndExcluding": "6.16" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.4.4" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/4265682c29c92f52c0da6fad5a79b5801462c8de" }, { "url": "https://git.kernel.org/stable/c/ac49b7560b4b08b1e4043a29214cc7ad77644c00" }, { "url": "https://git.kernel.org/stable/c/e2d2115e56c4a02377189bfc3a9a7933552a7b0f" } ], "title": "bpf: Do not include stack ptr register in precision backtracking bookkeeping", "x_generator": { "engine": "bippy-1.2.0" } } } }