CVE-2026-22990: libceph: replace overzealous BUG_ON in osdmap_apply_incremental()
Vulnerability summary
CVE-2026-22990 is a high (CVSS 7.5) Reachable Assertion vulnerability in linux. EPSS estimates a 0.40% chance of exploitation in the next 30 days, higher than 34.5% of scored vulnerabilities.
Severe, CVSS 7.5 (CVE.org); no exploitation reported by the 5 checked sources; EPSS 0% (FIRST, 03-11-2026)
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 55 · Related 37Timeline
- 23-01-2026PublishedVulnerability first disclosed.
- 19-10-2026Last modifiedVulnerability information updated.
Description
In the Linux kernel, the following vulnerability has been resolved: libceph: replace overzealous BUG_ON in osdmap_apply_incremental() If the osdmap is (maliciously) corrupted such that the incremental osdmap epoch is different from what is expected, there is no need to BUG. Instead, just declare the incremental osdmap to be invalid.
CVSS metrics
4 scores · 4 sources · 1 version- OSV · UbuntuEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- OSV · DebianEcosystem advisory · calculated5.5MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HDiffers
- NVDNIST5.5MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HDiffers
EPSS trend
Probability
0.40%
Chance of exploitation in the next 30 days
Percentile
35%
Versus all other CVEs
30-day change
Increase +0.02 pp
From 0.38% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root cause- CWE-617Reachable AssertionThe product contains an assert() or similar statement that can be triggered by an attacker, which leads to an application exit or other behavior that is more severe than necessary.
- CWE-400Uncontrolled Resource ConsumptionThe product does not properly control the allocation and maintenance of a limited resource.
Affected systems
Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.
Ubuntu157 products
- linuxAll versions (No fix recorded) | < 5.15.0-173.183 | < 6.8.0-117.117
- linux-allwinner-5.19All versions (No fix recorded)
- linux-awsAll versions (No fix recorded) | < 5.15.0-1103.110 | < 6.8.0-1055.58
- linux-aws-5.0All versions (No fix recorded)
- linux-aws-5.11All versions (No fix recorded)
Linux2 products
- linux≥ f24e9980eb860d8600cbe5ef3d2fd9295320d229, < 9aa0b0c14cefece078286d78b97d4c09685e372d | ≥ f24e9980eb860d8600cbe5ef3d2fd9295320d229, < 4b106fbb1c7b841cd402abd83eb2447164c799ea | ≥ f24e9980eb860d8600cbe5ef3d2fd9295320d229, < 6afd2a4213524bc742b709599a3663aeaf77193c | ≥ f24e9980eb860d8600cbe5ef3d2fd9295320d229, < d3613770e2677683e65d062da5e31f48c409abe9 | ≥ f24e9980eb860d8600cbe5ef3d2fd9295320d229, < 6c6cec3db3b418c4fdf815731bc39e46dff75e1b | ≥ f24e9980eb860d8600cbe5ef3d2fd9295320d229, < 6348d70af847b79805374fe628d3809a63fd7df3 | ≥ f24e9980eb860d8600cbe5ef3d2fd9295320d229, < e00c3f71b5cf75681dbd74ee3f982a99cb690c2b | 2.6.34
- linux_kernel≥ 2.6.34.1, < 5.10.248 | ≥ 5.11, < 5.15.198 | ≥ 5.16, < 6.1.161 | ≥ 6.2, < 6.6.121 | ≥ 6.7, < 6.12.66 | ≥ 6.13, < 6.18.6 | 2.6.34 | 2.6.34:rc2 | 2.6.34:rc3 | 2.6.34:rc4 | 2.6.34:rc5 | 2.6.34:rc6 | 2.6.34:rc7 | 6.19:rc1 | 6.19:rc2 | 6.19:rc3 | 6.19:rc4
Debian1 product
- linux< 6.1.162-1 | < 6.12.69-1 | < 6.18.8-1
3 vendors · 160 products
