CVE-2026-31515
af_key: validate families in pfkey_send_migrate()
In the Linux kernel, the following vulnerability has been resolved: af_key: validate families in pfkey_send_migrate() syzbot was able to trigger a crash in skb_put() [1] Issue is that pfkey_send_migrate() does not check old/new families, and that set_ipsecrequest() @family argument was truncated, thus possibly overfilling the skb. Validate families early, do not wait set_ipsecrequest(). [1] skbuff: skb_over_panic: text:ffffffff8a752120 len:392 put:16 head:ffff88802a4ad040 data:ffff88802a4ad040 tail:0x188 end:0x180 dev:<NULL> kernel BUG at net/core/skbuff.c:214 ! Call Trace: <TASK> skb_over_panic net/core/skbuff.c:219 [inline] skb_put+0x159/0x210 net/core/skbuff.c:2655 skb_put_zero include/linux/skbuff.h:2788 [inline] set_ipsecrequest net/key/af_key.c:3532 [inline] pfkey_send_migrate+0x1270/0x2e50 net/key/af_key.c:3636 km_migrate+0x155/0x260 net/xfrm/xfrm_state.c:2848 xfrm_migrate+0x2140/0x2450 net/xfrm/xfrm_policy.c:4705 xfrm_do_migrate+0x8ff/0xaa0 net/xfrm/xfrm_user.c:3150
Fixes and workarounds
No remediation reported in collected sources.
Missing remediation information is not evidence that no patch exists.
Affected products and versions
| Product | Versions | Authority |
|---|---|---|
| Linux Linux |
≥ 08de61beab8a21c8e0b3906a97defda5f1f66ece; < d0c5aa8dd38887714f1aad04236a3620b56a5e4e (affected, git) ≥ 08de61beab8a21c8e0b3906a97defda5f1f66ece; < e06b596fc4eb01936a2e5dccad17c946d660bab8 (affected, git) ≥ 08de61beab8a21c8e0b3906a97defda5f1f66ece; < 8ddf8de7e758f6888988467af9ffc8adf589fb16 (affected, git) ≥ 08de61beab8a21c8e0b3906a97defda5f1f66ece; < d3225e6b9bd51ec177970a628fe4b11237ce87d5 (affected, git) ≥ 08de61beab8a21c8e0b3906a97defda5f1f66ece; < 7b18692c59afb8e5c364c8e3ac01e51dd6b52028 (affected, git) ≥ 08de61beab8a21c8e0b3906a97defda5f1f66ece; < 83f644ea92987c100b82d8481ae2230faeed3d34 (affected, git) ≥ 08de61beab8a21c8e0b3906a97defda5f1f66ece; < ee836e820a40e2ca4da8af7310bff92d586772d4 (affected, git) ≥ 08de61beab8a21c8e0b3906a97defda5f1f66ece; < eb2d16a7d599dc9d4df391b5e660df9949963786 (affected, git) Other versions: unaffected |
CNA: Linux |
| Linux Linux |
2.6.21 (affected) ≥ 0; < 2.6.21 (unaffected, semver) ≥ 5.10.253; ≤ 5.10.* (unaffected, semver) ≥ 5.15.203; ≤ 5.15.* (unaffected, semver) ≥ 6.1.168; ≤ 6.1.* (unaffected, semver) ≥ 6.6.131; ≤ 6.6.* (unaffected, semver) ≥ 6.12.80; ≤ 6.12.* (unaffected, semver) ≥ 6.18.21; ≤ 6.18.* (unaffected, semver) ≥ 6.19.11; ≤ 6.19.* (unaffected, semver) ≥ 7.0; ≤ * (unaffected, original_commit_for_fix) Other versions: affected |
CNA: Linux |
| SIMATIC S7-1500 CPU 1518-4 PN/DP MFP Siemens |
≥ V3.1.6; < * (affected, custom)
Other versions: unknown |
ADP: siemens-SADP |
| SIMATIC S7-1500 CPU 1518-4 PN/DP MFP Siemens |
≥ V3.1.5; < * (affected, custom)
Other versions: unknown |
ADP: siemens-SADP |
| SIMATIC S7-1500 CPU 1518-4 PN/DP MFP Siemens |
≥ V3.1.7; < * (affected, custom)
Other versions: unknown |
ADP: siemens-SADP |
| SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP Siemens |
≥ V3.1.6; < * (affected, custom)
Other versions: unknown |
ADP: siemens-SADP |
| SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP Siemens |
≥ V3.1.5; < * (affected, custom)
Other versions: unknown |
ADP: siemens-SADP |
| SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP Siemens |
≥ V3.1.7; < * (affected, custom)
Other versions: unknown |
ADP: siemens-SADP |
| SIPLUS S7-1500 CPU 1518-4 PN/DP MFP Siemens |
≥ V3.1.6; < * (affected, custom)
Other versions: unknown |
ADP: siemens-SADP |
| SIPLUS S7-1500 CPU 1518-4 PN/DP MFP Siemens |
≥ V3.1.5; < * (affected, custom)
Other versions: unknown |
ADP: siemens-SADP |
| SIPLUS S7-1500 CPU 1518-4 PN/DP MFP Siemens |
≥ V3.1.7; < * (affected, custom)
Other versions: unknown |
ADP: siemens-SADP |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
No CVSS assessment reported. An unscored record is not a low-severity determination.
Exploit evidence
No exploit evidence in collected sources. This is not proof of no exploitation.
References
- https://git.kernel.org/stable/c/d0c5aa8dd38887714f1aad04236a3620b56a5e4eCNA: Linux
- https://git.kernel.org/stable/c/e06b596fc4eb01936a2e5dccad17c946d660bab8CNA: Linux
- https://git.kernel.org/stable/c/8ddf8de7e758f6888988467af9ffc8adf589fb16CNA: Linux
- https://git.kernel.org/stable/c/d3225e6b9bd51ec177970a628fe4b11237ce87d5CNA: Linux
- https://git.kernel.org/stable/c/7b18692c59afb8e5c364c8e3ac01e51dd6b52028CNA: Linux
- https://git.kernel.org/stable/c/83f644ea92987c100b82d8481ae2230faeed3d34CNA: Linux
- https://git.kernel.org/stable/c/ee836e820a40e2ca4da8af7310bff92d586772d4CNA: Linux
- https://git.kernel.org/stable/c/eb2d16a7d599dc9d4df391b5e660df9949963786CNA: Linux
- https://cert-portal.siemens.com/productcert/html/ssa-082556.htmlADP: siemens-SADP
- https://cert-portal.siemens.com/productcert/html/ssa-019113.htmlADP: siemens-SADP
- https://cert-portal.siemens.com/productcert/html/ssa-457936.htmlADP: siemens-SADP
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