CVE-2026-53033

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Source
https://cve.org/CVERecord?id=CVE-2026-53033
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-53033.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2026-53033
Downstream
Published
2026-06-24T16:29:40.794Z
Modified
2026-07-17T03:31:56.655221868Z
Severity
  • 7.8 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
Summary
bpf, sockmap: Take state lock for af_unix iter
Details

In the Linux kernel, the following vulnerability has been resolved:

bpf, sockmap: Take state lock for af_unix iter

When a BPF iterator program updates a sockmap, there is a race condition in unixstreambpfupdateproto() where the peer pointer can become stale[1] during a state transition TCPESTABLISHED -> TCPCLOSE.

    CPU0 bpf                          CPU1 close
    --------                          ----------

// unixstreambpfupdateproto() skpair = unixpeer(sk) if (unlikely(!skpair)) return -EINVAL; // unixreleasesock() skpair = unixpeer(sk); unixpeer(sk) = NULL; sockput(skpair) sockhold(skpair) // UaF

More practically, this fix guarantees that the iterator program is consistently provided with a unix socket that remains stable during iterator execution.

Write of size 4 at addr ffff8881178c9a00 by task testprogs/2231 Call Trace: dumpstacklvl+0x5d/0x80 printreport+0x170/0x4f3 kasanreport+0xe4/0x1c0 kasancheckrange+0x125/0x200 unixstreambpfupdateproto+0x155/0x490 sockmaplink+0x71c/0xec0 sockmapupdatecommon+0xbc/0x600 sockmapupdateelem+0x19a/0x1f0 bpfprogbbbf56096cdd4f01selectivedumpunix+0x20c/0x217 bpfiterrunprog+0x21e/0xae0 bpfiterunixseqshow+0x1e0/0x2a0 bpfseqread+0x42c/0x10d0 vfsread+0x171/0xb20 ksysread+0xff/0x200 dosyscall64+0xf7/0x5e0 entrySYSCALL64after_hwframe+0x76/0x7e

Allocated by task 2236: kasansavestack+0x30/0x50 kasansavetrack+0x14/0x30 __kasanslaballoc+0x63/0x80 kmem_cacheallocnoprof+0x1d5/0x680 skprotalloc+0x59/0x210 skalloc+0x34/0x470 unixcreate1+0x86/0x8a0 unixstreamconnect+0x318/0x15b0 __sys_connect+0xfd/0x130 __x64sysconnect+0x72/0xd0 dosyscall64+0xf7/0x5e0 entrySYSCALL64afterhwframe+0x76/0x7e

Freed by task 2236: kasansavestack+0x30/0x50 kasansavetrack+0x14/0x30 kasansavefree_info+0x3b/0x70 __kasanslabfree+0x47/0x70 kmemcachefree+0x11c/0x590 __skdestruct+0x432/0x6e0 unixreleasesock+0x9b3/0xf60 unixrelease+0x8a/0xf0 __sockrelease+0xb0/0x270 sockclose+0x18/0x20 __fput+0x36e/0xac0 fputclosesync+0xe5/0x1a0 __x64sysclose+0x7d/0xd0 dosyscall64+0xf7/0x5e0 entrySYSCALL64afterhwframe+0x76/0x7e

Database specific 
{
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53033.json"
}
References

Affected packages

Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git

Affected ranges

Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
2c860a43dd77f969bb959336a2f743d7103a8f63
Fixed
c6f4015eac2e3cbc3cb7a17539e10bbb5c2049c3
Fixed
d0d124dbcef9318e326956137b31671407094bd4
Fixed
1a59cc6b65fd3ad9915aae5970d859109d4ce9fb
Fixed
921920c34cb591947dd30c692500795a69f1e3fa
Fixed
98f744d204e5d6fca589cd2c44c3190a0c71697f
Fixed
64c2f93fc3254d3bf5de4445fb732ee5c451edb6

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-53033.json"

Linux / Kernel

Package

Name
Kernel

Affected ranges

Type
ECOSYSTEM
Events
Introduced
5.15.0
Fixed
6.1.175
Type
ECOSYSTEM
Events
Introduced
6.2.0
Fixed
6.6.141
Type
ECOSYSTEM
Events
Introduced
6.7.0
Fixed
6.12.91
Type
ECOSYSTEM
Events
Introduced
6.13.0
Fixed
6.18.33
Type
ECOSYSTEM
Events
Introduced
6.19.0
Fixed
7.0.10

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-53033.json"