tls: fix use-after-free on failed backlog decryption
Summary
| CVE | CVE-2024-26800 |
|---|---|
| State | PUBLISHED |
| Assigner | Linux |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2024-04-04 09:15:09 UTC |
| Updated | 2026-08-04 11:17:06 UTC |
| Description | In the Linux kernel, the following vulnerability has been resolved: tls: fix use-after-free on failed backlog decryption When the decrypt request goes to the backlog and crypto_aead_decrypt returns -EBUSY, tls_do_decryption will wait until all async decryptions have completed. If one of them fails, tls_do_decryption will return -EBADMSG and tls_decrypt_sg jumps to the error path, releasing all the pages. But the pages have been passed to the async callback, and have already been released by tls_decrypt_done. The only true async case is when crypto_aead_decrypt returns -EINPROGRESS. With -EBUSY, we already waited so we can tell tls_sw_recvmsg that the data is available for immediate copy, but we need to notify tls_decrypt_sg (via the new ->async_done flag) that the memory has already been released. |
Risk And Classification
Primary CVSS: v3.1 7.8 HIGH from [email protected]
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Problem Types: CWE-416
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 3.1 | [email protected] | Primary | 7.8 | HIGH | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| 3.1 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | Secondary | 9.8 | CRITICAL | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| 3.1 | CNA | DECLARED | 9.8 | CRITICAL | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
CVSS v3.1 Breakdown
Attack Vector
LocalAttack Complexity
LowPrivileges Required
LowUser Interaction
NoneScope
UnchangedConfidentiality
HighIntegrity
HighAvailability
HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD Known Affected Configurations (CPE 2.3)
| Type | Vendor | Product | Version | Update | Edition | Language |
|---|---|---|---|---|---|---|
| Operating System | Linux | Linux Kernel | All | All | All | All |
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Linux | Linux | affected cd1bbca03f3c1d845ce274c0d0a66de8e5929f72 f2b85a4cc763841843de693bbd7308fe9a2c4c89 git | Not specified |
| CNA | Linux | Linux | affected 13eca403876bbea3716e82cdfe6f1e6febb38754 81be85353b0f5a7b660635634b655329b429eefe git | Not specified |
| CNA | Linux | Linux | affected ab6397f072e5097f267abf5cb08a8004e6b17694 1ac9fb84bc7ecd4bc6428118301d9d864d2a58d1 git | Not specified |
| CNA | Linux | Linux | affected 8590541473188741055d27b955db0777569438e3 13114dc5543069f7b97991e3b79937b6da05f5b0 git | Not specified |
| CNA | Linux | Linux | affected 3ade391adc584f17b5570fd205de3ad029090368 git | Not specified |
| CNA | Linux | Linux | affected 5.15.160 5.16 semver | Not specified |
| CNA | Linux | Linux | affected 6.6.18 6.6.21 semver | Not specified |
| CNA | Linux | Linux | affected 6.7.6 6.7.9 semver | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| git.kernel.org/stable/c/13114dc5543069f7b97991e3b79937b6da05f5b0 | af854a3a-2127-422b-91ae-364da2661108 | git.kernel.org | Patch |
| git.kernel.org/stable/c/f2b85a4cc763841843de693bbd7308fe9a2c4c89 | af854a3a-2127-422b-91ae-364da2661108 | git.kernel.org | Patch |
| git.kernel.org/stable/c/81be85353b0f5a7b660635634b655329b429eefe | af854a3a-2127-422b-91ae-364da2661108 | git.kernel.org | Patch |
| git.kernel.org/stable/c/1ac9fb84bc7ecd4bc6428118301d9d864d2a58d1 | af854a3a-2127-422b-91ae-364da2661108 | git.kernel.org | Patch |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
Legacy QID Mappings
- 6000567 Debian Security Update for linux (DSA 5658-1)